diff --git a/.rubocop.yml b/.rubocop.yml
index f77cd3d9..e73a5de6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,6 @@
 inherit_from:
   - .rubocop_standardrb.yml
   - .rubocop_standardrb_overrides.yml
-  - .rubocop_todo.yml
 
 AllCops:
   NewCops: disable
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
deleted file mode 100644
index 852a55aa..00000000
--- a/.rubocop_todo.yml
+++ /dev/null
@@ -1,691 +0,0 @@
-# This configuration was generated by
-# `rubocop --auto-gen-config --no-exclude-limit --no-auto-gen-timestamp`
-# using RuboCop version 1.80.2.
-# The point is for the user to remove these configuration records
-# one by one as the offenses are removed from the code base.
-# Note that changes in the inspected code, or installation of new
-# versions of RuboCop, may require this file to be generated again.
-
-# Offense count: 26
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-    - 'lib/pliny/commands/generator/mediator.rb'
-    - 'lib/pliny/commands/generator/model.rb'
-    - 'lib/pliny/commands/generator/serializer.rb'
-    - 'lib/template/config/initializers/database.rb'
-    - 'lib/template/lib/routes.rb'
-
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyleAlignWith, Severity.
-# SupportedStylesAlignWith: start_of_line, begin
-Layout/BeginEndAlignment:
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-
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EmptyLineBetweenMethodDefs, EmptyLineBetweenClassDefs, EmptyLineBetweenModuleDefs, DefLikeMacros, AllowAdjacentOneLineDefs, NumberOfEmptyLines.
-Layout/EmptyLineBetweenDefs:
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-
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-Layout/EmptyLines:
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-
-# Offense count: 3
-# This cop supports safe autocorrection (--autocorrect).
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-# SupportedStyles: empty_lines, no_empty_lines
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-
-# Offense count: 2
-# This cop supports safe autocorrection (--autocorrect).
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-# SupportedStyles: empty_lines, empty_lines_except_namespace, empty_lines_special, no_empty_lines, beginning_only, ending_only
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-
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-Layout/EmptyLinesAroundModuleBody:
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-
-# Offense count: 49
-# This cop supports safe autocorrection (--autocorrect).
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-Layout/ExtraSpacing:
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-    - 'lib/template/config/config.rb'
-    - 'pliny.gemspec'
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-    - 'spec/error_reporters/rollbar_spec.rb'
-    - 'spec/error_reporters_spec.rb'
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-# Offense count: 63
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-# Configuration parameters: AllowMultipleStyles, EnforcedHashRocketStyle, EnforcedColonStyle, EnforcedLastArgumentHashStyle.
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-    - 'spec/commands/generator/endpoint_spec.rb'
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-
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-
-# Offense count: 4
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-Lint/AmbiguousRegexpLiteral:
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-
-# Offense count: 6
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-Lint/AssignmentInCondition:
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-# Offense count: 4
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-# Offense count: 1
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-
-# Offense count: 1
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-Lint/MissingCopEnableDirective:
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-
-# Offense count: 1
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-# Offense count: 3
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-# Offense count: 1
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-# Offense count: 1
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-    - 'lib/pliny/commands/generator/schema.rb'
-    - 'lib/pliny/commands/generator/serializer.rb'
-    - 'lib/pliny/config_helpers.rb'
-    - 'lib/pliny/error_reporters/rollbar.rb'
-    - 'lib/pliny/errors.rb'
-    - 'lib/pliny/helpers/encode.rb'
-    - 'lib/pliny/helpers/serialize.rb'
-    - 'lib/pliny/middleware/cors.rb'
-    - 'lib/pliny/middleware/versioning.rb'
-    - 'lib/pliny/rollbar_logger.rb'
-    - 'lib/pliny/router.rb'
-    - 'lib/pliny/tasks/schema.rake'
-    - 'lib/pliny/utils.rb'
-    - 'spec/commands/generator/base_spec.rb'
-    - 'spec/commands/generator/endpoint_spec.rb'
-    - 'spec/commands/generator/mediator_spec.rb'
-    - 'spec/commands/generator/migration_spec.rb'
-    - 'spec/commands/generator/model_spec.rb'
-    - 'spec/commands/generator/schema_spec.rb'
-    - 'spec/commands/generator/serializer_spec.rb'
-    - 'spec/commands/generator_spec.rb'
-    - 'spec/config_helpers_spec.rb'
-    - 'spec/db_support_spec.rb'
-    - 'spec/integration_spec.rb'
-    - 'spec/log_spec.rb'
-    - 'spec/metrics/backends/logger_spec.rb'
-    - 'spec/metrics_spec.rb'
-    - 'spec/middleware/versioning_spec.rb'
-    - 'spec/rollbar_logger_spec.rb'
-    - 'spec/router_spec.rb'
-    - 'spec/spec_helper.rb'
-
-# Offense count: 6
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: single_quotes, double_quotes
-Style/StringLiteralsInInterpolation:
-  Exclude:
-    - 'lib/pliny/db_support.rb'
-
-# Offense count: 32
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyleForMultiline.
-# SupportedStylesForMultiline: comma, consistent_comma, no_comma
-Style/TrailingCommaInArguments:
-  Exclude:
-    - 'lib/pliny/commands/generator/endpoint.rb'
-    - 'lib/pliny/commands/generator/mediator.rb'
-    - 'lib/pliny/commands/generator/model.rb'
-    - 'lib/pliny/commands/generator/serializer.rb'
-    - 'lib/pliny/log.rb'
-    - 'lib/pliny/middleware/instruments.rb'
-    - 'lib/template/config/initializers/database.rb'
-    - 'lib/template/lib/tasks/spec.rake'
-    - 'spec/canonical_log_line_helpers_spec.rb'
-    - 'spec/commands/generator/endpoint_spec.rb'
-    - 'spec/error_reporters/rollbar_spec.rb'
-    - 'spec/errors_spec.rb'
-    - 'spec/metrics_spec.rb'
-    - 'spec/middleware/instruments_spec.rb'
-
-# Offense count: 7
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyleForMultiline.
-# SupportedStylesForMultiline: comma, consistent_comma, diff_comma, no_comma
-Style/TrailingCommaInArrayLiteral:
-  Exclude:
-    - 'lib/pliny/db_support.rb'
-    - 'lib/pliny/middleware/versioning.rb'
-    - 'lib/template/bin/console'
-    - 'spec/commands/generator/base_spec.rb'
-    - 'spec/db_support_spec.rb'
-
-# Offense count: 6
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyleForMultiline.
-# SupportedStylesForMultiline: comma, consistent_comma, diff_comma, no_comma
-Style/TrailingCommaInHashLiteral:
-  Exclude:
-    - 'lib/pliny/db_support.rb'
-    - 'lib/pliny/middleware/cors.rb'
-    - 'lib/pliny/middleware/instruments.rb'
-    - 'lib/pliny/request_store.rb'
-    - 'spec/error_reporters/rollbar_spec.rb'
-    - 'spec/request_store_spec.rb'
-
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: ExactNameMatch, AllowPredicates, AllowDSLWriters, IgnoreClassMethods, AllowedMethods.
-# AllowedMethods: to_ary, to_a, to_c, to_enum, to_h, to_hash, to_i, to_int, to_io, to_open, to_path, to_proc, to_r, to_regexp, to_str, to_s, to_sym
-Style/TrivialAccessors:
-  Exclude:
-    - 'spec/middleware/rescue_errors_spec.rb'
-
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-Style/UnlessElse:
-  Exclude:
-    - 'lib/pliny/log.rb'
-
-# Offense count: 2
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: forbid_for_all_comparison_operators, forbid_for_equality_operators_only, require_for_all_comparison_operators, require_for_equality_operators_only
-Style/YodaCondition:
-  Exclude:
-    - 'spec/metrics_spec.rb'
-    - 'spec/middleware/metrics_spec.rb'
diff --git a/Gemfile b/Gemfile
index cd7558b7..fd3e4b2c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 
 gemspec
diff --git a/Rakefile b/Rakefile
index ca385ce9..a7f54a3b 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 $:.unshift File.expand_path("../lib", __FILE__)
 require "pliny/version"
 
-require 'rspec/core/rake_task'
+require "rspec/core/rake_task"
 RSpec::Core::RakeTask.new(:spec)
 task default: :spec
 
@@ -44,9 +46,9 @@ task :release do
   sh "rm pliny-#{new_version}.gem"
 end
 
-desc 'Open a irb/pry session preloaded with pliny'
+desc "Open a irb/pry session preloaded with pliny"
 task :console do
-  require 'pry'
-  require 'pliny'
+  require "pry"
+  require "pliny"
   Pry.start
 end
diff --git a/bin/pliny-generate b/bin/pliny-generate
index 89cee34b..859e2349 100755
--- a/bin/pliny-generate
+++ b/bin/pliny-generate
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-require_relative '../lib/pliny/commands/generator'
+require_relative "../lib/pliny/commands/generator"
 Pliny::Commands::Generator.start
diff --git a/bin/pliny-new b/bin/pliny-new
index 733deae3..8101226f 100755
--- a/bin/pliny-new
+++ b/bin/pliny-new
@@ -1,7 +1,8 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require "optparse"
-require_relative '../lib/pliny/commands/creator'
+require_relative "../lib/pliny/commands/creator"
 
 OptionParser.new do |options|
   opts = {}
diff --git a/bin/pliny-update b/bin/pliny-update
index bdfd4a3b..8516f2d1 100755
--- a/bin/pliny-update
+++ b/bin/pliny-update
@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require "optparse"
-require_relative '../lib/pliny/commands/updater'
+require_relative "../lib/pliny/commands/updater"
 
 Pliny::Commands::Updater.run
diff --git a/lib/pliny.rb b/lib/pliny.rb
index bedb6e98..6f6b7b40 100644
--- a/lib/pliny.rb
+++ b/lib/pliny.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "json"
 require "sinatra/base"
 
diff --git a/lib/pliny/canonical_log_line_helpers.rb b/lib/pliny/canonical_log_line_helpers.rb
index 413fb60a..0157ef24 100644
--- a/lib/pliny/canonical_log_line_helpers.rb
+++ b/lib/pliny/canonical_log_line_helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   # Helpers to produce a canonical log line. This mostly amounts to a set of
   # accessors that do basic type checking combined with tracking an internal
diff --git a/lib/pliny/commands/creator.rb b/lib/pliny/commands/creator.rb
index dd971e63..d2ef5f02 100644
--- a/lib/pliny/commands/creator.rb
+++ b/lib/pliny/commands/creator.rb
@@ -1,9 +1,11 @@
-require 'fileutils'
-require 'pathname'
-require 'pliny/version'
-require 'uri'
-require 'erb'
-require 'ostruct'
+# frozen_string_literal: true
+
+require "fileutils"
+require "pathname"
+require "pliny/version"
+require "uri"
+require "erb"
+require "ostruct"
 
 module Pliny::Commands
   class Creator
@@ -25,7 +27,7 @@ def run!
       FileUtils.copy_entry template_dir, app_dir
       FileUtils.rm_rf("#{app_dir}/.git")
       parse_erb_files
-      display 'Pliny app created. To start, run:'
+      display "Pliny app created. To start, run:"
       display "cd #{app_dir} && bin/setup"
     end
 
@@ -33,15 +35,13 @@ def run!
 
     def parse_erb_files
       Dir.glob("#{app_dir}/{*,.*}.erb").each do |file|
-        static_file = file.gsub(/\.erb$/, '')
+        static_file = file.gsub(/\.erb$/, "")
 
         template = ERB.new(File.read(file))
         context = OpenStruct.new(app_name: name)
         content = template.result(context.instance_eval { binding })
 
-        File.open(static_file, "w") do |f|
-          f.write content
-        end
+        File.write(static_file, content)
         FileUtils.rm(file)
       end
     end
@@ -55,7 +55,7 @@ def name
     end
 
     def template_dir
-      File.expand_path('../../template', File.dirname(__FILE__))
+      File.expand_path("../../template", File.dirname(__FILE__))
     end
 
     def app_dir
diff --git a/lib/pliny/commands/generator.rb b/lib/pliny/commands/generator.rb
index 91dea1b1..4a42340f 100644
--- a/lib/pliny/commands/generator.rb
+++ b/lib/pliny/commands/generator.rb
@@ -1,12 +1,14 @@
-require 'pliny/version'
-require 'thor'
+# frozen_string_literal: true
+
+require "pliny/version"
+require "thor"
 
 module Pliny::Commands
   class Generator < Thor
-    desc 'endpoint NAME', 'Generates an endpoint'
+    desc "endpoint NAME", "Generates an endpoint"
     method_option :scaffold, type: :boolean, default: false, hide: true
     def endpoint(name)
-      require_relative 'generator/endpoint'
+      require_relative "generator/endpoint"
 
       ep = Endpoint.new(name, options)
       ep.create
@@ -14,27 +16,27 @@ def endpoint(name)
       ep.create_acceptance_test
     end
 
-    desc 'mediator NAME', 'Generates a mediator'
+    desc "mediator NAME", "Generates a mediator"
     def mediator(name)
-      require_relative 'generator/mediator'
+      require_relative "generator/mediator"
 
       md = Mediator.new(name, options)
       md.create
       md.create_test
     end
 
-    desc 'migration NAME', 'Generates a migration'
+    desc "migration NAME", "Generates a migration"
     def migration(name)
-      require_relative 'generator/migration'
+      require_relative "generator/migration"
 
       mg = Migration.new(name, options)
       mg.create
     end
 
-    desc 'model NAME', 'Generates a model'
-    method_option :paranoid, type: :boolean, default: false, desc: 'adds paranoid support to model'
+    desc "model NAME", "Generates a model"
+    method_option :paranoid, type: :boolean, default: false, desc: "adds paranoid support to model"
     def model(name)
-      require_relative 'generator/model'
+      require_relative "generator/model"
 
       md = Model.new(name, options)
       md.create
@@ -42,8 +44,8 @@ def model(name)
       md.create_test
     end
 
-    desc 'scaffold NAME', 'Generates a scaffold of endpoint, model, schema and serializer'
-    method_option :paranoid, type: :boolean, default: false, desc: 'adds paranoid support to model'
+    desc "scaffold NAME", "Generates a scaffold of endpoint, model, schema and serializer"
+    method_option :paranoid, type: :boolean, default: false, desc: "adds paranoid support to model"
     method_option :scaffold, type: :boolean, default: true, hide: true
     def scaffold(name)
       endpoint(name)
@@ -52,18 +54,18 @@ def scaffold(name)
       serializer(name)
     end
 
-    desc 'schema NAME', 'Generates a schema'
+    desc "schema NAME", "Generates a schema"
     def schema(name)
-      require_relative 'generator/schema'
+      require_relative "generator/schema"
 
       sc = Schema.new(name, options)
       sc.create
       sc.rebuild
     end
 
-    desc 'serializer NAME', 'Generates a serializer'
+    desc "serializer NAME", "Generates a serializer"
     def serializer(name)
-      require_relative 'generator/serializer'
+      require_relative "generator/serializer"
 
       se = Serializer.new(name, options)
       se.create
diff --git a/lib/pliny/commands/generator/base.rb b/lib/pliny/commands/generator/base.rb
index 74937f86..06335e7f 100644
--- a/lib/pliny/commands/generator/base.rb
+++ b/lib/pliny/commands/generator/base.rb
@@ -1,8 +1,10 @@
-require 'active_support/inflector'
-require 'ostruct'
-require 'erb'
-require 'fileutils'
-require 'pliny'
+# frozen_string_literal: true
+
+require "active_support/inflector"
+require "ostruct"
+require "erb"
+require "fileutils"
+require "pliny"
 
 module Pliny::Commands
   class Generator
@@ -32,7 +34,7 @@ def pluralized_file_name
       end
 
       def table_name
-        name.tableize.tr('/', '_')
+        name.tableize.tr("/", "_")
       end
 
       def display(msg)
@@ -41,7 +43,7 @@ def display(msg)
 
       def render_template(template_file, vars = {})
         template_path = File.dirname(__FILE__) + "/../../templates/#{template_file}"
-        template = ERB.new(File.read(template_path), trim_mode: '>')
+        template = ERB.new(File.read(template_path), trim_mode: ">")
         context = OpenStruct.new(vars)
         template.result(context.instance_eval { binding })
       end
@@ -54,7 +56,7 @@ def write_template(template_file, destination_path, vars = {})
 
       def write_file(destination_path)
         FileUtils.mkdir_p(File.dirname(destination_path))
-        File.open(destination_path, 'w') do |f|
+        File.open(destination_path, "w") do |f|
           f.puts yield
         end
       end
@@ -62,7 +64,7 @@ def write_file(destination_path)
       private
 
       def normalize_name(name)
-        name.underscore.tr(' ', '_')
+        name.underscore.tr(" ", "_")
       end
     end
   end
diff --git a/lib/pliny/commands/generator/endpoint.rb b/lib/pliny/commands/generator/endpoint.rb
index 26aa92ce..80247baf 100644
--- a/lib/pliny/commands/generator/endpoint.rb
+++ b/lib/pliny/commands/generator/endpoint.rb
@@ -1,43 +1,45 @@
-require_relative 'base'
+# frozen_string_literal: true
+
+require_relative "base"
 
 module Pliny::Commands
   class Generator
     class Endpoint < Base
       def create
         endpoint = "./lib/endpoints/#{pluralized_file_name}.rb"
-        template = options[:scaffold] ? 'endpoint_scaffold.erb' : 'endpoint.erb'
+        template = options[:scaffold] ? "endpoint_scaffold.erb" : "endpoint.erb"
         write_template(template, endpoint,
-                        plural_class_name: plural_class_name,
-                        singular_class_name: singular_class_name,
-                        field_name: field_name,
-                        url_path: url_path)
+          plural_class_name: plural_class_name,
+          singular_class_name: singular_class_name,
+          field_name: field_name,
+          url_path: url_path,)
         display "created endpoint file #{endpoint}"
-        display 'add the following to lib/routes.rb:'
+        display "add the following to lib/routes.rb:"
         display "  mount Endpoints::#{plural_class_name}"
       end
 
       def create_test
         test = "./spec/endpoints/#{pluralized_file_name}_spec.rb"
-        write_template('endpoint_test.erb', test,
-                        plural_class_name: plural_class_name,
-                        singular_class_name: singular_class_name,
-                        url_path: url_path)
+        write_template("endpoint_test.erb", test,
+          plural_class_name: plural_class_name,
+          singular_class_name: singular_class_name,
+          url_path: url_path,)
         display "created test #{test}"
       end
 
       def create_acceptance_test
         test = "./spec/acceptance/#{pluralized_file_name}_spec.rb"
-        template = options[:scaffold] ? 'endpoint_scaffold_acceptance_test.erb' : 'endpoint_acceptance_test.erb'
+        template = options[:scaffold] ? "endpoint_scaffold_acceptance_test.erb" : "endpoint_acceptance_test.erb"
         write_template(template, test,
-                        plural_class_name: plural_class_name,
-                        field_name: field_name,
-                        singular_class_name: singular_class_name,
-                        url_path: url_path)
+          plural_class_name: plural_class_name,
+          field_name: field_name,
+          singular_class_name: singular_class_name,
+          url_path: url_path,)
         display "created test #{test}"
       end
 
       def url_path
-        '/' + name.pluralize.tr('_', '-')
+        "/" + name.pluralize.tr("_", "-")
       end
     end
   end
diff --git a/lib/pliny/commands/generator/mediator.rb b/lib/pliny/commands/generator/mediator.rb
index d70bd5bd..60304f5f 100644
--- a/lib/pliny/commands/generator/mediator.rb
+++ b/lib/pliny/commands/generator/mediator.rb
@@ -1,19 +1,21 @@
-require_relative 'base'
+# frozen_string_literal: true
+
+require_relative "base"
 
 module Pliny::Commands
   class Generator
     class Mediator < Base
       def create
         mediator = "./lib/mediators/#{field_name}.rb"
-        write_template('mediator.erb', mediator,
-                        singular_class_name: singular_class_name)
+        write_template("mediator.erb", mediator,
+          singular_class_name: singular_class_name,)
         display "created mediator file #{mediator}"
       end
 
       def create_test
         test = "./spec/mediators/#{field_name}_spec.rb"
-        write_template('mediator_test.erb', test,
-                        singular_class_name: singular_class_name)
+        write_template("mediator_test.erb", test,
+          singular_class_name: singular_class_name,)
         display "created test #{test}"
       end
     end
diff --git a/lib/pliny/commands/generator/migration.rb b/lib/pliny/commands/generator/migration.rb
index dd816fa1..50e7d337 100644
--- a/lib/pliny/commands/generator/migration.rb
+++ b/lib/pliny/commands/generator/migration.rb
@@ -1,11 +1,13 @@
-require_relative 'base'
+# frozen_string_literal: true
+
+require_relative "base"
 
 module Pliny::Commands
   class Generator
     class Migration < Base
       def create
         migration = "./db/migrate/#{Time.now.to_i}_#{name}.rb"
-        write_template('migration.erb', migration)
+        write_template("migration.erb", migration)
         display "created migration #{migration}"
       end
     end
diff --git a/lib/pliny/commands/generator/model.rb b/lib/pliny/commands/generator/model.rb
index 6b65a49a..fc93c72c 100644
--- a/lib/pliny/commands/generator/model.rb
+++ b/lib/pliny/commands/generator/model.rb
@@ -1,28 +1,30 @@
-require_relative 'base'
+# frozen_string_literal: true
+
+require_relative "base"
 
 module Pliny::Commands
   class Generator
     class Model < Base
       def create
         model = "./lib/models/#{field_name}.rb"
-        write_template('model.erb', model,
-                        singular_class_name: singular_class_name,
-                        paranoid: options[:paranoid])
+        write_template("model.erb", model,
+          singular_class_name: singular_class_name,
+          paranoid: options[:paranoid],)
         display "created model file #{model}"
       end
 
       def create_migration
         migration = "./db/migrate/#{Time.now.to_i}_create_#{table_name}.rb"
-        write_template('model_migration.erb', migration,
-                        table_name: table_name,
-                        paranoid: options[:paranoid])
+        write_template("model_migration.erb", migration,
+          table_name: table_name,
+          paranoid: options[:paranoid],)
         display "created migration #{migration}"
       end
 
       def create_test
         test = "./spec/models/#{field_name}_spec.rb"
-        write_template('model_test.erb', test,
-                        singular_class_name: singular_class_name)
+        write_template("model_test.erb", test,
+          singular_class_name: singular_class_name,)
         display "created test #{test}"
       end
     end
diff --git a/lib/pliny/commands/generator/schema.rb b/lib/pliny/commands/generator/schema.rb
index 293cae3e..62d31f49 100644
--- a/lib/pliny/commands/generator/schema.rb
+++ b/lib/pliny/commands/generator/schema.rb
@@ -1,5 +1,7 @@
-require_relative 'base'
-require 'prmd'
+# frozen_string_literal: true
+
+require_relative "base"
+require "prmd"
 
 module Pliny::Commands
   class Generator
diff --git a/lib/pliny/commands/generator/serializer.rb b/lib/pliny/commands/generator/serializer.rb
index 24631417..486bfcbe 100644
--- a/lib/pliny/commands/generator/serializer.rb
+++ b/lib/pliny/commands/generator/serializer.rb
@@ -1,19 +1,21 @@
-require_relative 'base'
+# frozen_string_literal: true
+
+require_relative "base"
 
 module Pliny::Commands
   class Generator
     class Serializer < Base
       def create
         serializer = "./lib/serializers/#{field_name}.rb"
-        write_template('serializer.erb', serializer,
-                        singular_class_name: singular_class_name)
+        write_template("serializer.erb", serializer,
+          singular_class_name: singular_class_name,)
         display "created serializer file #{serializer}"
       end
 
       def create_test
         test = "./spec/serializers/#{field_name}_spec.rb"
-        write_template('serializer_test.erb', test,
-                        singular_class_name: singular_class_name)
+        write_template("serializer_test.erb", test,
+          singular_class_name: singular_class_name,)
         display "created test #{test}"
       end
     end
diff --git a/lib/pliny/commands/updater.rb b/lib/pliny/commands/updater.rb
index d60039de..4bd78135 100644
--- a/lib/pliny/commands/updater.rb
+++ b/lib/pliny/commands/updater.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "fileutils"
 require "pathname"
 require "pliny/version"
@@ -21,7 +23,7 @@ def run!
       end
 
       version_current = get_current_version
-      version_target  = Gem::Version.new(Pliny::VERSION)
+      version_target = Gem::Version.new(Pliny::VERSION)
 
       if version_current == version_target
         display "Version #{version_current} is current, nothing to update."
@@ -50,7 +52,7 @@ def ensure_repo_available
 
     def get_current_version
       File.read("./Gemfile.lock").split("\n").each do |line|
-        next unless pliny_version = line.match(/pliny \(([\d+\.]+)\)/)
+        next unless (pliny_version = line.match(/pliny \(([\d+.]+)\)/))
         return Gem::Version.new(pliny_version[1])
       end
     end
diff --git a/lib/pliny/config_helpers.rb b/lib/pliny/config_helpers.rb
index 27a3ecc3..ed2453cc 100644
--- a/lib/pliny/config_helpers.rb
+++ b/lib/pliny/config_helpers.rb
@@ -1,16 +1,18 @@
+# frozen_string_literal: true
+
 module Pliny
   module CastingConfigHelpers
-    def mandatory(name, method=nil)
+    def mandatory(name, method = nil)
       value = cast(ENV.fetch(name.to_s.upcase), method)
       create(name, value)
     end
 
-    def optional(name, method=nil)
+    def optional(name, method = nil)
       value = cast(ENV[name.to_s.upcase], method)
       create(name, value)
     end
 
-    def override(name, default, method=nil)
+    def override(name, default, method = nil)
       value = cast(ENV.fetch(name.to_s.upcase, default), method)
       create(name, value)
     end
@@ -24,7 +26,7 @@ def float
     end
 
     def bool
-      ->(v) { v.to_s=='true'}
+      ->(v) { v.to_s == "true" }
     end
 
     def string
@@ -42,10 +44,8 @@ def symbol
     # optional :notype, array
     # => ['a', 'b']
     def array(method = nil)
-      -> (v) do
-        if v
-          v.split(",").map{|a| cast(a, method) }
-        end
+      ->(v) do
+        v&.split(",")&.map { |a| cast(a, method) }
       end
     end
 
@@ -76,7 +76,7 @@ def cast(value, method)
     def create(name, value)
       instance_variable_set(:"@#{name}", value)
       instance_eval "def #{name}; @#{name} end", __FILE__, __LINE__
-      if value.kind_of?(TrueClass) || value.kind_of?(FalseClass) || value.kind_of?(NilClass)
+      if value.is_a?(TrueClass) || value.is_a?(FalseClass) || value.is_a?(NilClass)
         instance_eval "def #{name}?; !!@#{name} end", __FILE__, __LINE__
       end
     end
@@ -88,10 +88,10 @@ def env
 
     # PLINY_ENV is deprecated, but it might be still used by someone.
     def legacy_env
-      if ENV.key?('PLINY_ENV')
+      if ENV.key?("PLINY_ENV")
         warn "PLINY_ENV is deprecated in favour of APP_ENV, " \
              "update .env file or application configuration."
-        ENV['PLINY_ENV']
+        ENV["PLINY_ENV"]
       end
     end
   end
@@ -130,7 +130,6 @@ def self.add_question_method(attr)
       end
     end
   end
-
 end
 
 # Supress the "use RbConfig instead" warning
diff --git a/lib/pliny/db_support.rb b/lib/pliny/db_support.rb
index 0c3f755e..4530a38e 100644
--- a/lib/pliny/db_support.rb
+++ b/lib/pliny/db_support.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "logger"
 require "sequel"
 require "sequel/extensions/migration"
@@ -15,12 +17,12 @@ def self.setup?(database_url)
       @db = Sequel.connect(database_url)
       @db.test_connection
       @db.disconnect
-      return true
+      true
     rescue Sequel::DatabaseConnectionError
-      return false
+      false
     end
 
-    def self.run(url, sequel_log_io=StringIO.new)
+    def self.run(url, sequel_log_io = StringIO.new)
       logger = Logger.new(sequel_log_io)
       instance = new(url, logger)
       yield instance
@@ -39,11 +41,11 @@ def initialize(url, sequel_logger)
 
     def exists?(name)
       res = db.fetch("SELECT 1 FROM pg_database WHERE datname = ?", name)
-      return res.count > 0
+      res.count > 0
     end
 
     def create(name)
-      db.run(%{CREATE DATABASE "#{name}"})
+      db.run(%(CREATE DATABASE "#{name}"))
     end
 
     def migrate(target = nil)
@@ -79,32 +81,30 @@ def status
           else
             :down
           end
+        elsif present_in_database
+          :file_missing
         else
-          if present_in_database
-            :file_missing
-          else
-            raise "error" # FIXME: better message
-          end
+          raise "error" # FIXME: better message
         end
       end
     end
 
     class MigrationStatusPresenter
       PADDING = 2
-      UP = "UP".freeze
-      DOWN = "DOWN".freeze
-      FILE_MISSING = "FILE MISSING".freeze
+      UP = "UP"
+      DOWN = "DOWN"
+      FILE_MISSING = "FILE MISSING"
 
       STATUS_MAP = {
         up: UP,
         down: DOWN,
-        file_missing: FILE_MISSING
+        file_missing: FILE_MISSING,
       }.freeze
 
       STATUS_OPTIONS = [
         UP,
         DOWN,
-        FILE_MISSING
+        FILE_MISSING,
       ].freeze
 
       attr_reader :migration_statuses
@@ -125,7 +125,7 @@ def header
         [
           barrier_row,
           header_row,
-          barrier_row
+          barrier_row,
         ]
       end
 
@@ -137,20 +137,20 @@ def statuses
 
       def footer
         [
-          barrier_row
+          barrier_row,
         ]
       end
 
       def barrier_row
-        "+#{'-' * (longest_status + PADDING)}+#{'-' * (longest_migration_name + PADDING)}+"
+        "+#{"-" * (longest_status + PADDING)}+#{"-" * (longest_migration_name + PADDING)}+"
       end
 
       def header_row
-        "|#{'STATUS'.center(longest_status + PADDING)}|#{'MIGRATION'.center(longest_migration_name + PADDING)}|"
+        "|#{"STATUS".center(longest_status + PADDING)}|#{"MIGRATION".center(longest_migration_name + PADDING)}|"
       end
 
       def status_row(migration_status)
-        "|#{STATUS_MAP[migration_status.status].center(longest_status + PADDING)}|#{' ' * (PADDING / 2)}#{migration_status.filename.ljust(longest_migration_name)}#{' ' * (PADDING / 2)}|"
+        "|#{STATUS_MAP[migration_status.status].center(longest_status + PADDING)}|#{" " * (PADDING / 2)}#{migration_status.filename.ljust(longest_migration_name)}#{" " * (PADDING / 2)}|"
       end
 
       private
@@ -210,7 +210,7 @@ def disconnect
 
     private
 
-    MIGRATION_DIR = "./db/migrate".freeze
+    MIGRATION_DIR = "./db/migrate"
     private_constant :MIGRATION_DIR
   end
 end
diff --git a/lib/pliny/error_reporters.rb b/lib/pliny/error_reporters.rb
index d7723b25..159b2176 100644
--- a/lib/pliny/error_reporters.rb
+++ b/lib/pliny/error_reporters.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::ErrorReporters
   extend self
 
@@ -9,11 +11,9 @@ def notify(exception, context: {}, rack_env: {})
     Pliny.log_exception(exception)
 
     error_reporters.each do |reporter|
-      begin
-        reporter.new.notify(exception, context: context, rack_env: rack_env)
-      rescue
-        Pliny.log_exception($!)
-      end
+      reporter.new.notify(exception, context: context, rack_env: rack_env)
+    rescue
+      Pliny.log_exception($!)
     end
   end
 end
diff --git a/lib/pliny/error_reporters/rollbar.rb b/lib/pliny/error_reporters/rollbar.rb
index f37c66cd..10d83b29 100644
--- a/lib/pliny/error_reporters/rollbar.rb
+++ b/lib/pliny/error_reporters/rollbar.rb
@@ -1,5 +1,7 @@
-require 'rollbar/exception_reporter'
-require 'rollbar/request_data_extractor'
+# frozen_string_literal: true
+
+require "rollbar/exception_reporter"
+require "rollbar/request_data_extractor"
 
 module Pliny
   module ErrorReporters
@@ -24,7 +26,7 @@ def fetch_scope(context:, rack_env:)
           scope[:person] = proc { extract_person_data_from_controller(rack_env) }
         end
         scope
-      rescue Exception => e
+      rescue Exception => e # rubocop:disable Lint/RescueException
         report_exception_to_rollbar(rack_env, e)
         raise
       end
diff --git a/lib/pliny/errors.rb b/lib/pliny/errors.rb
index 69db9f23..bf049ddc 100644
--- a/lib/pliny/errors.rb
+++ b/lib/pliny/errors.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   module Errors
     class Error < StandardError
@@ -19,9 +21,9 @@ class HTTPStatusError < Error
       attr_accessor :status
 
       def initialize(message = nil, id = nil, status = nil)
-        meta    = Pliny::Errors::META[self.class]
-        message = message || meta[1] + "."
-        id      = id || meta[1].downcase.tr(' ', '_').to_sym
+        meta = Pliny::Errors::META[self.class]
+        message ||= meta[1] + "."
+        id ||= meta[1].downcase.tr(" ", "_").to_sym
         @status = status || meta[0]
         super(message, id)
       end
@@ -71,47 +73,47 @@ class GatewayTimeout < HTTPStatusError; end               # 504
 
     # Messages for nicer exceptions, from rfc2616
     META = {
-      Continue                     => [100, 'Continue'],
-      SwitchingProtocols           => [101, 'Switching protocols'],
-      OK                           => [200, 'OK'],
-      Created                      => [201, 'Created'],
-      Accepted                     => [202, 'Accepted'],
-      NonAuthoritativeInformation  => [203, 'Non-authoritative information'],
-      NoContent                    => [204, 'No content'],
-      ResetContent                 => [205, 'Reset content'],
-      PartialContent               => [206, 'Partial content'],
-      MultipleChoices              => [300, 'Multiple choices'],
-      MovedPermanently             => [301, 'Moved permanently'],
-      Found                        => [302, 'Found'],
-      SeeOther                     => [303, 'See other'],
-      NotModified                  => [304, 'Not modified'],
-      UseProxy                     => [305, 'Use proxy'],
-      TemporaryRedirect            => [307, 'Temporary redirect'],
-      BadRequest                   => [400, 'Bad request'],
-      Unauthorized                 => [401, 'Unauthorized'],
-      PaymentRequired              => [402, 'Payment required'],
-      Forbidden                    => [403, 'Forbidden'],
-      NotFound                     => [404, 'Not found'],
-      MethodNotAllowed             => [405, 'Method not allowed'],
-      NotAcceptable                => [406, 'Not acceptable'],
-      ProxyAuthenticationRequired  => [407, 'Proxy authentication required'],
-      RequestTimeout               => [408, 'Request timeout'],
-      Conflict                     => [409, 'Conflict'],
-      Gone                         => [410, 'Gone'],
-      LengthRequired               => [411, 'Length required'],
-      PreconditionFailed           => [412, 'Precondition failed'],
-      RequestEntityTooLarge        => [413, 'Request entity too large'],
-      RequestURITooLong            => [414, 'Request-URI too long'],
-      UnsupportedMediaType         => [415, 'Unsupported media type'],
-      RequestedRangeNotSatisfiable => [416, 'Requested range not satisfiable'],
-      ExpectationFailed            => [417, 'Expectation failed'],
-      UnprocessableEntity          => [422, 'Unprocessable entity'],
-      TooManyRequests              => [429, 'Too many requests'],
-      InternalServerError          => [500, 'Internal server error'],
-      NotImplemented               => [501, 'Not implemented'],
-      BadGateway                   => [502, 'Bad gateway'],
-      ServiceUnavailable           => [503, 'Service unavailable'],
-      GatewayTimeout               => [504, 'Gateway timeout'],
+      Continue => [100, "Continue"],
+      SwitchingProtocols => [101, "Switching protocols"],
+      OK => [200, "OK"],
+      Created => [201, "Created"],
+      Accepted => [202, "Accepted"],
+      NonAuthoritativeInformation => [203, "Non-authoritative information"],
+      NoContent => [204, "No content"],
+      ResetContent => [205, "Reset content"],
+      PartialContent => [206, "Partial content"],
+      MultipleChoices => [300, "Multiple choices"],
+      MovedPermanently => [301, "Moved permanently"],
+      Found => [302, "Found"],
+      SeeOther => [303, "See other"],
+      NotModified => [304, "Not modified"],
+      UseProxy => [305, "Use proxy"],
+      TemporaryRedirect => [307, "Temporary redirect"],
+      BadRequest => [400, "Bad request"],
+      Unauthorized => [401, "Unauthorized"],
+      PaymentRequired => [402, "Payment required"],
+      Forbidden => [403, "Forbidden"],
+      NotFound => [404, "Not found"],
+      MethodNotAllowed => [405, "Method not allowed"],
+      NotAcceptable => [406, "Not acceptable"],
+      ProxyAuthenticationRequired => [407, "Proxy authentication required"],
+      RequestTimeout => [408, "Request timeout"],
+      Conflict => [409, "Conflict"],
+      Gone => [410, "Gone"],
+      LengthRequired => [411, "Length required"],
+      PreconditionFailed => [412, "Precondition failed"],
+      RequestEntityTooLarge => [413, "Request entity too large"],
+      RequestURITooLong => [414, "Request-URI too long"],
+      UnsupportedMediaType => [415, "Unsupported media type"],
+      RequestedRangeNotSatisfiable => [416, "Requested range not satisfiable"],
+      ExpectationFailed => [417, "Expectation failed"],
+      UnprocessableEntity => [422, "Unprocessable entity"],
+      TooManyRequests => [429, "Too many requests"],
+      InternalServerError => [500, "Internal server error"],
+      NotImplemented => [501, "Not implemented"],
+      BadGateway => [502, "Bad gateway"],
+      ServiceUnavailable => [503, "Service unavailable"],
+      GatewayTimeout => [504, "Gateway timeout"],
     }.freeze
   end
 end
diff --git a/lib/pliny/helpers/encode.rb b/lib/pliny/helpers/encode.rb
index ec531b4b..a81908fc 100644
--- a/lib/pliny/helpers/encode.rb
+++ b/lib/pliny/helpers/encode.rb
@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 module Pliny::Helpers
   module Encode
     def encode(object)
-      content_type :json, charset: 'utf-8'
-      if params[:pretty] == 'true' || Config.pretty_json
+      content_type :json, charset: "utf-8"
+      if params[:pretty] == "true" || Config.pretty_json
         JSON.pretty_generate(object)
       else
         JSON.generate(object)
diff --git a/lib/pliny/helpers/params.rb b/lib/pliny/helpers/params.rb
index d15aa6b7..9acab394 100644
--- a/lib/pliny/helpers/params.rb
+++ b/lib/pliny/helpers/params.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::Helpers
   module Params
     def body_params
diff --git a/lib/pliny/helpers/serialize.rb b/lib/pliny/helpers/serialize.rb
index 9fe65859..62dbc206 100644
--- a/lib/pliny/helpers/serialize.rb
+++ b/lib/pliny/helpers/serialize.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::Helpers
   module Serialize
     def self.registered(base)
@@ -10,17 +12,17 @@ def serialize(data, structure = :default)
         serializer_class = settings.serializer_class
 
         if serializer_class.nil?
-          raise <<~eos.strip
+          raise <<~EOS.strip
             No serializer has been specified for this endpoint. Please specify one with
             `serializer Serializers::ModelName` in the endpoint.
-          eos
+          EOS
         end
 
-        env['pliny.serializer_arity'] = data.respond_to?(:size) ? data.size : 1
+        env["pliny.serializer_arity"] = data.respond_to?(:size) ? data.size : 1
 
         start = Time.now
         serializer_class.new(structure).serialize(data).tap do
-          env['pliny.serializer_timing'] = (Time.now - start).to_f
+          env["pliny.serializer_timing"] = (Time.now - start).to_f
         end
       end
     end
diff --git a/lib/pliny/helpers/zulu_time.rb b/lib/pliny/helpers/zulu_time.rb
index 5c05c3d3..f804881d 100644
--- a/lib/pliny/helpers/zulu_time.rb
+++ b/lib/pliny/helpers/zulu_time.rb
@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module Pliny::Helpers
   module ZuluTime
     def zulu_time(time)
-      time ? time.getutc.strftime("%Y-%m-%dT%H:%M:%SZ") : nil
+      time&.getutc&.strftime("%Y-%m-%dT%H:%M:%SZ")
     end
   end
 end
diff --git a/lib/pliny/log.rb b/lib/pliny/log.rb
index 308e4d11..41d21a0e 100644
--- a/lib/pliny/log.rb
+++ b/lib/pliny/log.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   module Log
     def log(data, &block)
@@ -16,22 +18,20 @@ def log_exception(e, data = {})
       exception_id = e.object_id
 
       # Log backtrace in reverse order for easier digestion.
-      if e.backtrace
-        e.backtrace.reverse.each do |backtrace|
-          log_to_stream(stderr || $stderr, merge_log_contexts(
-            exception_id: exception_id,
-            backtrace:    backtrace
-          ))
-        end
+      e.backtrace&.reverse&.each do |backtrace|
+        log_to_stream(stderr || $stderr, merge_log_contexts(
+          exception_id: exception_id,
+          backtrace: backtrace,
+        ),)
       end
 
       # then log the exception message last so that it's as close to the end of
       # a log trace as possible
       data.merge!(
-        exception:    true,
-        class:        e.class.name,
-        message:      e.message,
-        exception_id: exception_id
+        exception: true,
+        class: e.class.name,
+        message: e.message,
+        exception_id: exception_id,
       )
 
       data[:status] = e.status if e.respond_to?(:status)
@@ -42,10 +42,9 @@ def log_exception(e, data = {})
     def context(data, &block)
       old = local_context
       self.local_context = old.merge(data)
-      res = block.call
+      block.call
     ensure
       self.local_context = old
-      res
     end
 
     def default_context=(default_context)
@@ -102,24 +101,26 @@ def log_context
     end
 
     def log_to_stream(stream, data, &block)
-      unless block
-        data = log_scrubber.call(data) if log_scrubber
-        str = unparse(data)
-        stream.print(str + "\n")
-      else
+      if block
         data = data.dup
         start = Time.now
         log_to_stream(stream, data.merge(at: "start"))
         begin
           res = yield
           log_to_stream(stream, data.merge(
-            at: "finish", elapsed: (Time.now - start).to_f))
+            at: "finish", elapsed: (Time.now - start).to_f,
+          ),)
           res
         rescue
           log_to_stream(stream, data.merge(
-            at: "exception", elapsed: (Time.now - start).to_f))
+            at: "exception", elapsed: (Time.now - start).to_f,
+          ),)
           raise $!
         end
+      else
+        data = log_scrubber.call(data) if log_scrubber
+        str = unparse(data)
+        stream.print(str + "\n")
       end
     end
 
@@ -129,11 +130,11 @@ def replace_newlines(v)
 
     def quote_string(v)
       if !v.include?('"')
-        %{"#{v}"}
+        %("#{v}")
       elsif !v.include?("'")
-        %{'#{v}'}
+        %('#{v}')
       else
-        %{"#{v.gsub(/"/, '\\"')}"}
+        %("#{v.gsub('"', '\\"')}")
       end
     end
 
@@ -144,7 +145,7 @@ def unparse(attrs)
     def unparse_pair(k, v)
       v = v.call if v.is_a?(Proc)
 
-      if v == nil
+      if v.nil?
         nil
       elsif v == true
         k
@@ -153,7 +154,7 @@ def unparse_pair(k, v)
       elsif v.is_a?(Time)
         "#{k}=#{v.iso8601}"
       else
-        v = "#{v}"
+        v = v.to_s
         v = replace_newlines(v)
         v = quote_string(v) if v =~ /\s/
 
diff --git a/lib/pliny/metrics.rb b/lib/pliny/metrics.rb
index 7d8ecf9d..56ec8935 100644
--- a/lib/pliny/metrics.rb
+++ b/lib/pliny/metrics.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   module Metrics
     extend self
@@ -7,7 +9,7 @@ module Metrics
     @backends = [Backends::Logger]
 
     def count(*names, value: 1)
-      counts = Hash[names.map { |n| ["#{Config.app_name}.#{n}", value] }]
+      counts = names.map { |n| ["#{Config.app_name}.#{n}", value] }.to_h
 
       backends.each do |backend|
         report_and_catch { backend.report_counts(counts) }
@@ -32,7 +34,7 @@ def measure(*inputs, &block)
           0
         end
 
-      measures = Hash[inputs.map { |n| ["#{Config.app_name}.#{n}", measurement] }]
+      measures = inputs.map { |n| ["#{Config.app_name}.#{n}", measurement] }.to_h
 
       backends.each do |backend|
         report_and_catch { backend.report_measures(measures) }
diff --git a/lib/pliny/metrics/backends/logger.rb b/lib/pliny/metrics/backends/logger.rb
index 887af51f..c141be37 100644
--- a/lib/pliny/metrics/backends/logger.rb
+++ b/lib/pliny/metrics/backends/logger.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   module Metrics
     module Backends
@@ -10,11 +12,11 @@ def self.report_measures(measures)
           Pliny.log(add_prefix(:measure, measures))
         end
 
-        private
-
         def self.add_prefix(type, metrics)
-          metrics.map { |k, v| [ "#{type}##{k}", v ] }.to_h
+          metrics.map { |k, v| ["#{type}##{k}", v] }.to_h
         end
+
+        private_class_method :add_prefix
       end
     end
   end
diff --git a/lib/pliny/middleware/canonical_log_line.rb b/lib/pliny/middleware/canonical_log_line.rb
index 2b088210..4598e407 100644
--- a/lib/pliny/middleware/canonical_log_line.rb
+++ b/lib/pliny/middleware/canonical_log_line.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware
   # Emits a "canonical log line", i.e. a single log line that contains as much
   # relevant information about a request as possible and which makes for a
@@ -75,7 +77,7 @@ def call(env)
           # error
           #
 
-          if error = env["pliny.error"]
+          if (error = env["pliny.error"])
             line.error_class = error.class.name
             line.error_message = error.message
             if error.is_a?(Pliny::Errors::Error)
@@ -93,7 +95,7 @@ def call(env)
           line.request_method = request.request_method
           line.request_path = request.path_info
           line.request_user_agent = request.user_agent
-          if route = env["sinatra.route"]
+          if (route = env["sinatra.route"])
             line.request_route_signature = route.split(" ").last
           end
 
@@ -101,7 +103,7 @@ def call(env)
           # response
           #
 
-          if length = headers["Content-Length"]
+          if (length = headers["Content-Length"])
             line.response_length = length.to_i
           end
           line.response_status = status
diff --git a/lib/pliny/middleware/cors.rb b/lib/pliny/middleware/cors.rb
index 430ebd18..ca13e69a 100644
--- a/lib/pliny/middleware/cors.rb
+++ b/lib/pliny/middleware/cors.rb
@@ -1,12 +1,13 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware
   class CORS
-
-    ALLOW_METHODS  =
-      %w( GET POST PUT PATCH DELETE OPTIONS ).freeze
-    ALLOW_HEADERS  =
-      %w( Content-Type Accept Authorization Cache-Control If-None-Match If-Modified-Since Origin).freeze
+    ALLOW_METHODS =
+      %w[GET POST PUT PATCH DELETE OPTIONS].freeze
+    ALLOW_HEADERS =
+      %w[Content-Type Accept Authorization Cache-Control If-None-Match If-Modified-Since Origin].freeze
     EXPOSE_HEADERS =
-      %w( Cache-Control Content-Language Content-Type Expires Last-Modified Pragma ).freeze
+      %w[Cache-Control Content-Language Content-Type Expires Last-Modified Pragma].freeze
 
     @@additional_headers = []
 
@@ -44,12 +45,12 @@ def allow_headers
 
     def cors_headers(env)
       {
-        'access-control-allow-origin'      => env["HTTP_ORIGIN"],
-        'access-control-allow-methods'     => ALLOW_METHODS.join(', '),
-        'access-control-allow-headers'     => allow_headers.join(', '),
-        'access-control-allow-credentials' => "true",
-        'access-control-max-age'           => "1728000",
-        'access-control-expose-headers'    => EXPOSE_HEADERS.join(', ')
+        "access-control-allow-origin" => env["HTTP_ORIGIN"],
+        "access-control-allow-methods" => ALLOW_METHODS.join(", "),
+        "access-control-allow-headers" => allow_headers.join(", "),
+        "access-control-allow-credentials" => "true",
+        "access-control-max-age" => "1728000",
+        "access-control-expose-headers" => EXPOSE_HEADERS.join(", "),
       }
     end
   end
diff --git a/lib/pliny/middleware/instruments.rb b/lib/pliny/middleware/instruments.rb
index a9b91f22..f9e095b3 100644
--- a/lib/pliny/middleware/instruments.rb
+++ b/lib/pliny/middleware/instruments.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware
   class Instruments
     def initialize(app)
@@ -9,24 +11,24 @@ def call(env)
 
       data = {
         instrumentation: true,
-        method:          env["REQUEST_METHOD"],
-        path:            env["PATH_INFO"]
+        method: env["REQUEST_METHOD"],
+        path: env["PATH_INFO"],
       }
 
       Pliny.log(data.merge(at: "start"))
 
       status, headers, response = @app.call(env)
 
-      if route = env["sinatra.route"]
+      if (route = env["sinatra.route"])
         data.merge!(route_signature: route.split(" ").last)
       end
 
       elapsed = (Time.now - start).to_f
       Pliny.log(data.merge(
-        at:              "finish",
-        status:          status,
-        length:          headers["Content-Length"],
-        elapsed:         elapsed
+        at: "finish",
+        status: status,
+        length: headers["Content-Length"],
+        elapsed: elapsed,
       ))
 
       [status, headers, response]
diff --git a/lib/pliny/middleware/metrics.rb b/lib/pliny/middleware/metrics.rb
index aa3f543b..671b38d3 100644
--- a/lib/pliny/middleware/metrics.rb
+++ b/lib/pliny/middleware/metrics.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware
   class Metrics
     def initialize(app)
@@ -18,7 +20,7 @@ def call(env)
         elapsed = (Time.now - start).to_f
         Pliny::Metrics.measure("requests.latency", value: elapsed)
 
-        status_level = "#{status/100}xx"
+        status_level = "#{status / 100}xx"
         Pliny::Metrics.count("requests.status.#{status_level}")
       end
 
diff --git a/lib/pliny/middleware/request_id.rb b/lib/pliny/middleware/request_id.rb
index 1c620662..e4692da7 100644
--- a/lib/pliny/middleware/request_id.rb
+++ b/lib/pliny/middleware/request_id.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # please add changes here to core's Instruments as well
 
 module Pliny::Middleware
@@ -47,8 +49,8 @@ def raw_request_ids(env)
       # field as to whether it should be prefixed with `X-` or not. API went
       # with no prefix, but Hermes went with one. Support both formats on
       # input.
-      %w(HTTP_REQUEST_ID HTTP_X_REQUEST_ID).inject([]) do |request_ids, key|
-        if ids = env[key]
+      %w[HTTP_REQUEST_ID HTTP_X_REQUEST_ID].inject([]) do |request_ids, key|
+        if (ids = env[key])
           request_ids += ids.split(",")
         end
         request_ids
diff --git a/lib/pliny/middleware/request_store/clear.rb b/lib/pliny/middleware/request_store/clear.rb
index 327fe9f0..e521c005 100644
--- a/lib/pliny/middleware/request_store/clear.rb
+++ b/lib/pliny/middleware/request_store/clear.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware::RequestStore
   class Clear
-    def initialize(app, options={})
+    def initialize(app, options = {})
       @app = app
       @store = options[:store] || Pliny::RequestStore
     end
diff --git a/lib/pliny/middleware/request_store/seed.rb b/lib/pliny/middleware/request_store/seed.rb
index 7f4ffec8..11cd8b8d 100644
--- a/lib/pliny/middleware/request_store/seed.rb
+++ b/lib/pliny/middleware/request_store/seed.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware::RequestStore
   class Seed
-    def initialize(app, options={})
+    def initialize(app, options = {})
       @app = app
       @store = options[:store] || Pliny::RequestStore
     end
diff --git a/lib/pliny/middleware/rescue_errors.rb b/lib/pliny/middleware/rescue_errors.rb
index 6809a1cf..bbc2b1db 100644
--- a/lib/pliny/middleware/rescue_errors.rb
+++ b/lib/pliny/middleware/rescue_errors.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny::Middleware
   class RescueErrors
     def initialize(app, options = {})
diff --git a/lib/pliny/middleware/versioning.rb b/lib/pliny/middleware/versioning.rb
index 3fa5d2fc..7001f488 100644
--- a/lib/pliny/middleware/versioning.rb
+++ b/lib/pliny/middleware/versioning.rb
@@ -1,8 +1,10 @@
-require 'http_accept'
+# frozen_string_literal: true
+
+require "http_accept"
 
 module Pliny::Middleware
   class Versioning
-    def initialize(app, options={})
+    def initialize(app, options = {})
       @app = app
       @default = options[:default] || raise("missing=default")
       @app_name = options[:app_name] || raise("missing=app_name")
@@ -22,17 +24,15 @@ def detect_api_version(env)
       version = nil
       media_types.map! do |media_type|
         if accept_headers.include?(media_type.format)
-          unless media_type.params['version']
-            error = { id: :bad_version, message: <<-eos }
-Please specify a version along with the MIME type. For example, `Accept: application/vnd.#{@app_name}+json; version=1`.
-            eos
+          unless media_type.params["version"]
+            error = { id: :bad_version, message: <<~EOS }
+              Please specify a version along with the MIME type. For example, `Accept: application/vnd.#{@app_name}+json; version=1`.
+            EOS
             return [400, { "content-type" => "application/json; charset=utf-8" },
-              [JSON.generate(error)]]
+              [JSON.generate(error)],]
           end
 
-          unless version
-            version = media_type.params["version"]
-          end
+          version ||= media_type.params["version"]
 
           # replace the MIME with a simplified version for easier
           # parsing down the stack
@@ -41,7 +41,7 @@ def detect_api_version(env)
         end
         media_type.to_s
       end
-      env['HTTP_ACCEPT'] = media_types.join(', ')
+      env["HTTP_ACCEPT"] = media_types.join(", ")
 
       version ||= @default
       set_api_version(env, version)
diff --git a/lib/pliny/request_store.rb b/lib/pliny/request_store.rb
index 4d5d190f..aaf4d5f3 100644
--- a/lib/pliny/request_store.rb
+++ b/lib/pliny/request_store.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   module RequestStore
     def self.clear!
@@ -6,12 +8,12 @@ def self.clear!
 
     def self.seed(env)
       store[:request_id] =
-        env["REQUEST_IDS"] ? env["REQUEST_IDS"].join(",") : nil
+        env["REQUEST_IDS"]&.join(",")
 
       # a global context that evolves over the lifetime of the request, and is
       # used to tag all log messages that it produces
       store[:log_context] = {
-        request_id: store[:request_id]
+        request_id: store[:request_id],
       }
     end
 
diff --git a/lib/pliny/rollbar_logger.rb b/lib/pliny/rollbar_logger.rb
index 7aa67511..f6cb208a 100644
--- a/lib/pliny/rollbar_logger.rb
+++ b/lib/pliny/rollbar_logger.rb
@@ -1,19 +1,21 @@
+# frozen_string_literal: true
+
 module Pliny
   class RollbarLogger
     def debug(message)
-      log('debug', message)
+      log("debug", message)
     end
 
     def info(message)
-      log('info', message)
+      log("info", message)
     end
 
     def warn(message)
-      log('warn', message)
+      log("warn", message)
     end
 
     def error(message)
-      log('error', message)
+      log("error", message)
     end
 
     def log(level, message)
diff --git a/lib/pliny/router.rb b/lib/pliny/router.rb
index a90fdd1c..233964f6 100644
--- a/lib/pliny/router.rb
+++ b/lib/pliny/router.rb
@@ -1,8 +1,9 @@
-require 'sinatra/router'
+# frozen_string_literal: true
+
+require "sinatra/router"
 
 module Pliny
   class Router < Sinatra::Router
-
     # yield to a builder block in which all defined apps will only respond for
     # the given version
     def version(*versions, &block)
diff --git a/lib/pliny/tasks.rb b/lib/pliny/tasks.rb
index 4a1eddea..882a690d 100644
--- a/lib/pliny/tasks.rb
+++ b/lib/pliny/tasks.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Dir[File.expand_path("../tasks", __FILE__) + "/*.rake"].sort.each do |f|
   load(f)
 end
diff --git a/lib/pliny/tasks/db.rake b/lib/pliny/tasks/db.rake
index 1ae7ada8..677e67ed 100644
--- a/lib/pliny/tasks/db.rake
+++ b/lib/pliny/tasks/db.rake
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "logger"
 require "uri"
 require "pliny/utils"
@@ -165,7 +167,7 @@ begin
     end
 
     def name_from_uri(uri)
-      URI.parse(uri).path[1..-1]
+      URI.parse(uri).path[1..]
     end
   end
 rescue LoadError
diff --git a/lib/pliny/tasks/schema.rake b/lib/pliny/tasks/schema.rake
index cc790ce0..e20af339 100644
--- a/lib/pliny/tasks/schema.rake
+++ b/lib/pliny/tasks/schema.rake
@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 desc "Rebuild schema.json"
 task :schema do
-  require 'pliny/commands/generator/schema'
+  require "pliny/commands/generator/schema"
   Pliny::Commands::Generator::Schema.new(nil).rebuild
 end
diff --git a/lib/pliny/utils.rb b/lib/pliny/utils.rb
index 2b32c6d9..cea4244c 100644
--- a/lib/pliny/utils.rb
+++ b/lib/pliny/utils.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 module Pliny
   module Utils
     def self.parse_env(file)
       env = {}
       File.open(file).each do |line|
-        line = line.gsub(/#.*$/, '').strip
+        line = line.gsub(/#.*$/, "").strip
         next if line.empty?
         var, value = line.split("=", 2)
         value.gsub!(/^['"](.*)['"]$/, '\1')
@@ -27,7 +29,7 @@ def self.require_glob(path)
     end
 
     class << self
-      alias :require_relative_glob :require_glob
+      alias_method :require_relative_glob, :require_glob
     end
   end
 end
diff --git a/lib/pliny/version.rb b/lib/pliny/version.rb
index 8b204fcc..6388bc83 100644
--- a/lib/pliny/version.rb
+++ b/lib/pliny/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Pliny
   VERSION = "1.2.0"
 end
diff --git a/lib/template/.rubocop.yml b/lib/template/.rubocop.yml
index 0450d15d..eb43772b 100644
--- a/lib/template/.rubocop.yml
+++ b/lib/template/.rubocop.yml
@@ -23,6 +23,3 @@ Style/Documentation:
 Style/StringLiterals:
   Enabled: true
   EnforcedStyle: double_quotes
-
-Style/FrozenStringLiteralComment:
-  Enabled: false
diff --git a/lib/template/Gemfile b/lib/template/Gemfile
index 10ff6d33..bf0dc99b 100644
--- a/lib/template/Gemfile
+++ b/lib/template/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 ruby "2.4.0"
 
diff --git a/lib/template/Rakefile b/lib/template/Rakefile
index 861b2e2b..2f90a0ad 100644
--- a/lib/template/Rakefile
+++ b/lib/template/Rakefile
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 require "pliny/tasks"
 
diff --git a/lib/template/bin/console b/lib/template/bin/console
index 31e16488..515a246a 100755
--- a/lib/template/bin/console
+++ b/lib/template/bin/console
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require_relative "../lib/application"
 
@@ -15,7 +16,7 @@ Pry.prompt = [
 
   proc do |target_self, nest_level, pry|
     basic_prompt(target_self, nest_level, pry) + "* "
-  end
+  end,
 ]
 
 Pry.start
diff --git a/lib/template/bin/run b/lib/template/bin/run
index 45dc3835..638bd462 100755
--- a/lib/template/bin/run
+++ b/lib/template/bin/run
@@ -1,7 +1,10 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 # rubocop:disable Security/Eval
 
 require_relative "../lib/application"
 
 eval ARGV.join(" ")
+
+# rubocop:enable Security/Eval
diff --git a/lib/template/config.ru b/lib/template/config.ru
index 0d3a5a85..8a2f9995 100644
--- a/lib/template/config.ru
+++ b/lib/template/config.ru
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative "lib/application"
 
 $stdout.sync = true
diff --git a/lib/template/config/config.rb b/lib/template/config/config.rb
index 713d6c4a..2406e2ec 100644
--- a/lib/template/config/config.rb
+++ b/lib/template/config/config.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "pliny/config_helpers"
 
 # Access all config keys like the following:
@@ -13,23 +15,23 @@ module Config
   mandatory :database_url, string
 
   # Optional -- value is returned or `nil` if it wasn't present.
-  optional :app_name,            string
-  optional :versioning_default,  string
+  optional :app_name, string
+  optional :versioning_default, string
   optional :versioning_app_name, string
 
   # Override -- value is returned or the set default.
-  override :database_timeout, 10,           int
-  override :db_pool,          5,            int
-  override :deployment,       "production", string
-  override :force_ssl,        true,         bool
-  override :app_env,          "production", string
-  override :port,             5000,         int
-  override :pretty_json,      false,        bool
-  override :puma_max_threads, 16,           int
-  override :puma_min_threads, 1,            int
-  override :puma_workers,     3,            int
-  override :raise_errors,     false,        bool
-  override :root,             File.expand_path("../../", __FILE__), string
-  override :timeout,          10,           int
-  override :versioning,       false,        bool
+  override :database_timeout, 10, int
+  override :db_pool, 5, int
+  override :deployment, "production", string
+  override :force_ssl, true, bool
+  override :app_env, "production", string
+  override :port, 5000, int
+  override :pretty_json, false, bool
+  override :puma_max_threads, 16, int
+  override :puma_min_threads, 1, int
+  override :puma_workers, 3, int
+  override :raise_errors, false, bool
+  override :root, File.expand_path("../../", __FILE__), string
+  override :timeout, 10, int
+  override :versioning, false, bool
 end
diff --git a/lib/template/config/initializers/database.rb b/lib/template/config/initializers/database.rb
index 1f1bff95..0b6d5fd1 100644
--- a/lib/template/config/initializers/database.rb
+++ b/lib/template/config/initializers/database.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 database_setup_proc = lambda do |conn|
   # identify postgres connections coming from this process in pg_stat_activity
   process_identifier = ENV["DYNO"] || File.basename($PROGRAM_NAME).gsub(/\W+/, "_")
@@ -6,5 +8,5 @@
 end
 
 DB = Sequel.connect(Config.database_url,
-                    max_connections: Config.db_pool,
-                    after_connect: database_setup_proc)
+  max_connections: Config.db_pool,
+  after_connect: database_setup_proc,)
diff --git a/lib/template/config/initializers/log.rb b/lib/template/config/initializers/log.rb
index 2f3bb2ec..0f62e728 100644
--- a/lib/template/config/initializers/log.rb
+++ b/lib/template/config/initializers/log.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Pliny.default_context = {}
 Pliny.default_context[:app] = Config.app_name if Config.app_name
 Pliny.default_context[:deployment] = Config.deployment
diff --git a/lib/template/config/initializers/metrics.rb b/lib/template/config/initializers/metrics.rb
index c2b8aa09..ea59d6bf 100644
--- a/lib/template/config/initializers/metrics.rb
+++ b/lib/template/config/initializers/metrics.rb
@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 Pliny::Metrics.backends = [Pliny::Metrics::Backends::Logger]
diff --git a/lib/template/config/initializers/rollbar.rb b/lib/template/config/initializers/rollbar.rb
index 79329f26..365e584b 100644
--- a/lib/template/config/initializers/rollbar.rb
+++ b/lib/template/config/initializers/rollbar.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "pliny/error_reporters/rollbar"
 
 Pliny::ErrorReporters.error_reporters << Pliny::ErrorReporters::Rollbar
diff --git a/lib/template/config/puma.rb b/lib/template/config/puma.rb
index 53a24c02..0d1100b8 100644
--- a/lib/template/config/puma.rb
+++ b/lib/template/config/puma.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "./config/config"
 
 environment Config.rack_env
diff --git a/lib/template/db/seeds.rb b/lib/template/db/seeds.rb
index 0f14889d..d462bd7f 100644
--- a/lib/template/db/seeds.rb
+++ b/lib/template/db/seeds.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file should contain all the record creation needed to seed the database
 # with its default values.
 # The data can then be loaded with the rake db:seed (or created alongside the
diff --git a/lib/template/lib/application.rb b/lib/template/lib/application.rb
index 898a00b5..32320b85 100644
--- a/lib/template/lib/application.rb
+++ b/lib/template/lib/application.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "bundler"
 Bundler.require
 
diff --git a/lib/template/lib/endpoints/base.rb b/lib/template/lib/endpoints/base.rb
index dd925574..1729086a 100644
--- a/lib/template/lib/endpoints/base.rb
+++ b/lib/template/lib/endpoints/base.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Endpoints
   # The base class for all Sinatra-based endpoints. Use sparingly.
   class Base < Sinatra::Base
diff --git a/lib/template/lib/endpoints/health.rb b/lib/template/lib/endpoints/health.rb
index f44eb836..9bc14e65 100644
--- a/lib/template/lib/endpoints/health.rb
+++ b/lib/template/lib/endpoints/health.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Endpoints
   class Health < Base
     namespace "/health" do
diff --git a/lib/template/lib/endpoints/root.rb b/lib/template/lib/endpoints/root.rb
index 22297709..dd4a7fe3 100644
--- a/lib/template/lib/endpoints/root.rb
+++ b/lib/template/lib/endpoints/root.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Endpoints
   class Root < Base
     get "/" do
diff --git a/lib/template/lib/endpoints/schema.rb b/lib/template/lib/endpoints/schema.rb
index 94e50bb2..7fd982ea 100644
--- a/lib/template/lib/endpoints/schema.rb
+++ b/lib/template/lib/endpoints/schema.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Endpoints
   class Schema < Base
     get "/schema.json" do
diff --git a/lib/template/lib/initializer.rb b/lib/template/lib/initializer.rb
index 1360c70c..e8e580b8 100644
--- a/lib/template/lib/initializer.rb
+++ b/lib/template/lib/initializer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Initializer
   def self.run
     require_config
@@ -11,7 +13,7 @@ def self.require_config
   end
 
   def self.require_lib
-    require! %w(
+    require! %w[
       lib/serializers/base
       lib/serializers/**/*
       lib/endpoints/base
@@ -19,13 +21,13 @@ def self.require_lib
       lib/mediators/base
       lib/mediators/**/*
       lib/routes
-    )
+    ]
   end
 
   def self.require_models
-    require! %w(
+    require! %w[
       lib/models/**/*
-    )
+    ]
   end
 
   def self.require_initializers
diff --git a/lib/template/lib/mediators/base.rb b/lib/template/lib/mediators/base.rb
index f0cb45b8..d138552e 100644
--- a/lib/template/lib/mediators/base.rb
+++ b/lib/template/lib/mediators/base.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Mediators
   class Base
     def self.run(options = {})
diff --git a/lib/template/lib/routes.rb b/lib/template/lib/routes.rb
index 832e13cc..4d59222f 100644
--- a/lib/template/lib/routes.rb
+++ b/lib/template/lib/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Routes = Rack::Builder.new do
   use Pliny::Middleware::RequestStore::Clear, store: Pliny::RequestStore
   use Pliny::Middleware::CORS
@@ -6,18 +8,18 @@
   use Pliny::Middleware::Metrics
   use Pliny::Middleware::Instruments
   use Pliny::Middleware::CanonicalLogLine,
-      emitter: -> (data) {
-        Pliny.log_with_default_context({ canonical_log_line: true }.merge(data))
-      }
+    emitter: ->(data) {
+      Pliny.log_with_default_context({ canonical_log_line: true }.merge(data))
+    }
   use Pliny::Middleware::RescueErrors, raise: Config.raise_errors?
   if Config.timeout.positive?
     use Rack::Timeout,
-        service_timeout: Config.timeout
+      service_timeout: Config.timeout
   end
   if Config.versioning?
     use Pliny::Middleware::Versioning,
-        default: Config.versioning_default,
-        app_name: Config.versioning_app_name
+      default: Config.versioning_default,
+      app_name: Config.versioning_app_name
   end
   use Rack::Deflater
   use Rack::MethodOverride
diff --git a/lib/template/lib/serializers/base.rb b/lib/template/lib/serializers/base.rb
index 8006eb20..ead7c738 100644
--- a/lib/template/lib/serializers/base.rb
+++ b/lib/template/lib/serializers/base.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Serializers
   class Base
     extend Pliny::Helpers::ZuluTime
diff --git a/lib/template/lib/tasks/rubocop.rake b/lib/template/lib/tasks/rubocop.rake
index 3a3b67fb..b1ba8511 100644
--- a/lib/template/lib/tasks/rubocop.rake
+++ b/lib/template/lib/tasks/rubocop.rake
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 if Gem.loaded_specs.has_key?("rubocop-rspec")
   require "rubocop/rake_task"
 
diff --git a/lib/template/lib/tasks/spec.rake b/lib/template/lib/tasks/spec.rake
index f8d1a98c..890cdb67 100644
--- a/lib/template/lib/tasks/spec.rake
+++ b/lib/template/lib/tasks/spec.rake
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 
 # define our own version of the spec task because rspec might not be available
 # in the production environment, so we can't rely on RSpec::Core::RakeTask
@@ -6,7 +7,7 @@ task :spec do
   require "rspec/core"
   code = RSpec::Core::Runner.run(
     ["./spec"],
-    $stderr, $stdout
+    $stderr, $stdout,
   )
   exit(code) unless code.zero?
 end
diff --git a/lib/template/spec/endpoints/health_spec.rb b/lib/template/spec/endpoints/health_spec.rb
index ec0bc431..d4116305 100644
--- a/lib/template/spec/endpoints/health_spec.rb
+++ b/lib/template/spec/endpoints/health_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 RSpec.describe Endpoints::Health do
diff --git a/lib/template/spec/endpoints/schema_spec.rb b/lib/template/spec/endpoints/schema_spec.rb
index 31c9cbc0..9e114056 100644
--- a/lib/template/spec/endpoints/schema_spec.rb
+++ b/lib/template/spec/endpoints/schema_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 RSpec.describe Endpoints::Schema do
diff --git a/lib/template/spec/spec_helper.rb b/lib/template/spec/spec_helper.rb
index b12d1b6a..f0aee210 100644
--- a/lib/template/spec/spec_helper.rb
+++ b/lib/template/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # Require this file using `require "spec_helper"` to ensure that it is only
diff --git a/lib/template/spec/spec_support/auto_define_rack_app.rb b/lib/template/spec/spec_support/auto_define_rack_app.rb
index 1352c44a..1e858860 100644
--- a/lib/template/spec/spec_support/auto_define_rack_app.rb
+++ b/lib/template/spec/spec_support/auto_define_rack_app.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 RSpec.configure do |config|
   config.before(:context) do |spec|
     # weird ruby syntax, but test if the described_class inherits Sinatra::Base:
diff --git a/lib/template/spec/spec_support/coverage.rb b/lib/template/spec/spec_support/coverage.rb
index 8d5071a9..480cab6d 100644
--- a/lib/template/spec/spec_support/coverage.rb
+++ b/lib/template/spec/spec_support/coverage.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # setting ENV["CI"] configures simplecov for continuous integration output
 # setting ENV["COVERAGE"] generates a report when running tests locally
 if ENV["COVERAGE"] || ENV["CI"]
diff --git a/lib/template/spec/spec_support/log.rb b/lib/template/spec/spec_support/log.rb
index 6034b8e6..e6d5d99b 100644
--- a/lib/template/spec/spec_support/log.rb
+++ b/lib/template/spec/spec_support/log.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 unless ENV["TEST_LOGS"] == "true"
   module Pliny
     module Log
diff --git a/pliny.gemspec b/pliny.gemspec
index c25b76a7..662618c5 100644
--- a/pliny.gemspec
+++ b/pliny.gemspec
@@ -1,19 +1,21 @@
+# frozen_string_literal: true
+
 $:.unshift File.expand_path("../lib", __FILE__)
 require "pliny/version"
 
 Gem::Specification.new do |gem|
-  gem.name    = "pliny"
+  gem.name = "pliny"
   gem.version = Pliny::VERSION
 
-  gem.authors     = ["Brandur Leach", "Pedro Belo"]
-  gem.email       = ["brandur@mutelight.org", "pedrobelo@gmail.com"]
-  gem.homepage    = "https://github.com/interagent/pliny"
-  gem.summary     = "Basic tooling to support API apps in Sinatra"
+  gem.authors = ["Brandur Leach", "Pedro Belo"]
+  gem.email = ["brandur@mutelight.org", "pedrobelo@gmail.com"]
+  gem.homepage = "https://github.com/interagent/pliny"
+  gem.summary = "Basic tooling to support API apps in Sinatra"
   gem.description = "Pliny is a set of base classes and helpers to help developers write excellent APIs in Sinatra"
-  gem.license     = "MIT"
+  gem.license = "MIT"
 
-  gem.executables = %x{ git ls-files }.split("\n").select { |d| d =~ /^bin\// }.map { |d| d.gsub(/^bin\//, "") }
-  gem.files = %x{ git ls-files }.split("\n").select { |d| d =~ %r{^(License|README|bin/|data/|ext/|lib/|spec/|test/)} }
+  gem.executables = `git ls-files`.split("\n").select { |d| d =~ /^bin\// }.map { |d| d.gsub(/^bin\//, "") }
+  gem.files = `git ls-files`.split("\n").select { |d| d =~ %r{^(License|README|bin/|data/|ext/|lib/|spec/|test/)} }
 
   gem.required_ruby_version = ">= 3.2"
 
diff --git a/spec/canonical_log_line_helpers_spec.rb b/spec/canonical_log_line_helpers_spec.rb
index 0290dec0..94702266 100644
--- a/spec/canonical_log_line_helpers_spec.rb
+++ b/spec/canonical_log_line_helpers_spec.rb
@@ -1,14 +1,16 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
-describe Pliny::CanonicalLogLineHelpers do
-  class TestCanonicalLogLine
-    include Pliny::CanonicalLogLineHelpers
+class TestCanonicalLogLine
+  include Pliny::CanonicalLogLineHelpers
 
-    log_field :field_float, Float
-    log_field :field_integer, Integer
-    log_field :field_string, String
-  end
+  log_field :field_float, Float
+  log_field :field_integer, Integer
+  log_field :field_string, String
+end
 
+describe Pliny::CanonicalLogLineHelpers do
   it "allows a field to be set" do
     line = TestCanonicalLogLine.new
     line.field_string = "foo"
@@ -34,6 +36,6 @@ class TestCanonicalLogLine
     line.field_integer = 42
     line.field_string = "foo"
     assert_equal({ field_float: 3.14, field_integer: 42, field_string: "foo" },
-      line.to_h)
+      line.to_h,)
   end
 end
diff --git a/spec/commands/creator_spec.rb b/spec/commands/creator_spec.rb
index 567c31a7..f89d04a7 100644
--- a/spec/commands/creator_spec.rb
+++ b/spec/commands/creator_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "pliny/commands/creator"
 require "spec_helper"
 
diff --git a/spec/commands/generator/base_spec.rb b/spec/commands/generator/base_spec.rb
index 6b138245..90aab400 100644
--- a/spec/commands/generator/base_spec.rb
+++ b/spec/commands/generator/base_spec.rb
@@ -1,120 +1,122 @@
-require 'pliny/commands/generator'
-require 'pliny/commands/generator/base'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/generator"
+require "pliny/commands/generator/base"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Base do
   def generator(name, options = {}, stream = StringIO.new)
     Pliny::Commands::Generator::Base.new(name, options, stream)
   end
 
-  describe '#name' do
-    it 'generates a normalized name given differents argument formats' do
+  describe "#name" do
+    it "generates a normalized name given differents argument formats" do
       [
-        'resource history',
-        'resource-history',
-        'resource_history',
-        'ResourceHistory'
+        "resource history",
+        "resource-history",
+        "resource_history",
+        "ResourceHistory",
       ].each do |argument|
         actual = generator(argument).name
-        assert_equal 'resource_history', actual
+        assert_equal "resource_history", actual
       end
     end
   end
 
-  describe '#singular_class_name' do
-    it 'builds a class name for an endpoint' do
-      actual = generator('resource_histories').singular_class_name
-      assert_equal 'ResourceHistory', actual
+  describe "#singular_class_name" do
+    it "builds a class name for an endpoint" do
+      actual = generator("resource_histories").singular_class_name
+      assert_equal "ResourceHistory", actual
     end
   end
 
-  describe '#plural_class_name' do
-    it 'builds a class name for a model' do
-      actual = generator('resource_histories').plural_class_name
-      assert_equal 'ResourceHistories', actual
+  describe "#plural_class_name" do
+    it "builds a class name for a model" do
+      actual = generator("resource_histories").plural_class_name
+      assert_equal "ResourceHistories", actual
     end
   end
 
-  describe '#field_name' do
-    it 'uses the singular form' do
-      actual = generator('resource_histories').field_name
-      assert_equal 'resource_history', actual
+  describe "#field_name" do
+    it "uses the singular form" do
+      actual = generator("resource_histories").field_name
+      assert_equal "resource_history", actual
     end
   end
 
-  describe '#pluralized_file_name' do
-    it 'uses the plural form' do
-      actual = generator('resource_history').pluralized_file_name
-      assert_equal 'resource_histories', actual
+  describe "#pluralized_file_name" do
+    it "uses the plural form" do
+      actual = generator("resource_history").pluralized_file_name
+      assert_equal "resource_histories", actual
     end
 
-    describe 'when name with slashs' do
-      it 'handles slashs as directory' do
-        actual = generator('resource/history').pluralized_file_name
-        assert_equal 'resource/histories', actual
+    describe "when name with slashs" do
+      it "handles slashs as directory" do
+        actual = generator("resource/history").pluralized_file_name
+        assert_equal "resource/histories", actual
       end
     end
   end
 
-  describe '#table_name' do
-    it 'uses the plural form' do
-      actual = generator('resource_history').table_name
-      assert_equal 'resource_histories', actual
+  describe "#table_name" do
+    it "uses the plural form" do
+      actual = generator("resource_history").table_name
+      assert_equal "resource_histories", actual
     end
 
-    describe 'when name with slashs' do
-      it 'handles slashs as underscores' do
-        actual = generator('resource/history').table_name
-        assert_equal 'resource_histories', actual
+    describe "when name with slashs" do
+      it "handles slashs as underscores" do
+        actual = generator("resource/history").table_name
+        assert_equal "resource_histories", actual
       end
     end
   end
 
-  describe '#display' do
-    it 'puts given message into stream' do
+  describe "#display" do
+    it "puts given message into stream" do
       stream = StringIO.new
-      message = 'Hello world'
-      generator('resource_history', {}, stream).display(message)
+      message = "Hello world"
+      generator("resource_history", {}, stream).display(message)
 
       assert_includes stream.string, message
     end
   end
 
-  describe '#render_template' do
-    it 'renders template into a string' do
-      template = generator('resource_history').render_template('endpoint.erb')
-      assert_match /module Endpoints/, template
+  describe "#render_template" do
+    it "renders template into a string" do
+      template = generator("resource_history").render_template("endpoint.erb")
+      assert_match(/module Endpoints/, template)
     end
   end
 
-  describe '#write_template' do
-    let(:destination_path) { File.join(Dir.mktmpdir, 'endpoint.rb') }
+  describe "#write_template" do
+    let(:destination_path) { File.join(Dir.mktmpdir, "endpoint.rb") }
 
     before do
-      generator('resource_history').write_template('endpoint.erb', destination_path)
+      generator("resource_history").write_template("endpoint.erb", destination_path)
     end
 
-    it 'renders given template into a file by given path' do
+    it "renders given template into a file by given path" do
       assert File.exist?(destination_path)
-      assert_match /module Endpoints/, File.read(destination_path)
+      assert_match(/module Endpoints/, File.read(destination_path))
     end
   end
-  
-  describe '#write_file' do
-    let(:destination_path) { File.join(Dir.mktmpdir, 'foo.txt') }
+
+  describe "#write_file" do
+    let(:destination_path) { File.join(Dir.mktmpdir, "foo.txt") }
 
     before do
-      generator('resource_history').write_file(destination_path) do
-        'Hello world'
+      generator("resource_history").write_file(destination_path) do
+        "Hello world"
       end
     end
 
-    it 'creates a file by given path' do
+    it "creates a file by given path" do
       assert File.exist?(destination_path)
     end
 
-    it 'writes given content into a file' do
-      assert_match /Hello world/, File.read(destination_path)
+    it "writes given content into a file" do
+      assert_match(/Hello world/, File.read(destination_path))
     end
   end
 end
diff --git a/spec/commands/generator/endpoint_spec.rb b/spec/commands/generator/endpoint_spec.rb
index f73b7dc9..7accc51e 100644
--- a/spec/commands/generator/endpoint_spec.rb
+++ b/spec/commands/generator/endpoint_spec.rb
@@ -1,26 +1,28 @@
-require 'pliny/commands/generator'
-require 'pliny/commands/generator/endpoint'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/generator"
+require "pliny/commands/generator/endpoint"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Endpoint do
   subject { Pliny::Commands::Generator::Endpoint.new(endpoint_name, {}, StringIO.new) }
-  let(:endpoint_name) { 'resource_history' }
+  let(:endpoint_name) { "resource_history" }
 
-  describe '#url_path' do
-    it 'builds a URL path' do
-      assert_equal '/resource-histories', subject.url_path
+  describe "#url_path" do
+    it "builds a URL path" do
+      assert_equal "/resource-histories", subject.url_path
     end
   end
 
-  describe 'template' do
+  describe "template" do
     before do
       # render the stub endpoint template to a string
       template = subject.render_template("endpoint.erb",
         plural_class_name: "Artists",
-        url_path:          "/artists")
+        url_path: "/artists",)
 
       # eval and assign it to rack_app so tests are pointing to it
-      @rack_app = eval(template)
+      @rack_app = eval(template) # rubocop:disable Security/Eval
     end
 
     it "defines a stub GET /" do
@@ -32,26 +34,25 @@
     it "defines a stub POST /" do
       post "/artists"
       assert_equal 201, last_response.status
-      assert_equal Hash.new, JSON.parse(last_response.body)
+      assert_equal({}, JSON.parse(last_response.body))
     end
 
     it "defines a stub GET /:id" do
       get "/artists/123"
       assert_equal 200, last_response.status
-      assert_equal Hash.new, JSON.parse(last_response.body)
+      assert_equal({}, JSON.parse(last_response.body))
     end
 
     it "defines a stub PATCH /:id" do
       patch "/artists/123"
       assert_equal 200, last_response.status
-      assert_equal Hash.new, JSON.parse(last_response.body)
+      assert_equal({}, JSON.parse(last_response.body))
     end
 
     it "defines a stub DELETE /:id" do
       delete "/artists/123"
       assert_equal 200, last_response.status
-      assert_equal Hash.new, JSON.parse(last_response.body)
+      assert_equal({}, JSON.parse(last_response.body))
     end
-
   end
 end
diff --git a/spec/commands/generator/mediator_spec.rb b/spec/commands/generator/mediator_spec.rb
index 78acf3aa..cb9d1a66 100644
--- a/spec/commands/generator/mediator_spec.rb
+++ b/spec/commands/generator/mediator_spec.rb
@@ -1,24 +1,26 @@
-require 'pliny/commands/generator/mediator'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/generator/mediator"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Mediator do
-  subject { described_class.new('creator', {}, StringIO.new) }
+  subject { described_class.new("creator", {}, StringIO.new) }
 
   around do |example|
     Dir.chdir(Dir.mktmpdir, &example)
   end
 
-  describe '#create' do
-    it 'creates a mediator file' do
+  describe "#create" do
+    it "creates a mediator file" do
       subject.create
-      assert File.exist?('lib/mediators/creator.rb')
+      assert File.exist?("lib/mediators/creator.rb")
     end
   end
 
-  describe '#create_test' do
-    it 'creates a mediator test file' do
+  describe "#create_test" do
+    it "creates a mediator test file" do
       subject.create_test
-      assert File.exist?('spec/mediators/creator_spec.rb')
+      assert File.exist?("spec/mediators/creator_spec.rb")
     end
   end
 end
diff --git a/spec/commands/generator/migration_spec.rb b/spec/commands/generator/migration_spec.rb
index 4f421009..4479aa37 100644
--- a/spec/commands/generator/migration_spec.rb
+++ b/spec/commands/generator/migration_spec.rb
@@ -1,15 +1,17 @@
-require 'pliny/commands/generator/migration'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/generator/migration"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Migration do
-  subject { described_class.new('create_artists', {}, StringIO.new) }
+  subject { described_class.new("create_artists", {}, StringIO.new) }
 
   around do |example|
     Dir.chdir(Dir.mktmpdir, &example)
   end
 
-  describe '#create' do
-    it 'creates a migration file' do
+  describe "#create" do
+    it "creates a migration file" do
       subject.create
       assert_equal 1, Dir.glob("db/migrate/*_create_artists.rb").size
     end
diff --git a/spec/commands/generator/model_spec.rb b/spec/commands/generator/model_spec.rb
index 5ebfe2ca..c6225625 100644
--- a/spec/commands/generator/model_spec.rb
+++ b/spec/commands/generator/model_spec.rb
@@ -1,31 +1,33 @@
-require 'pliny/commands/generator/model'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/generator/model"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Model do
-  subject { described_class.new('artist', {}, StringIO.new) }
+  subject { described_class.new("artist", {}, StringIO.new) }
 
   around do |example|
     Dir.chdir(Dir.mktmpdir, &example)
   end
 
-  describe '#create' do
-    it 'creates a model file' do
+  describe "#create" do
+    it "creates a model file" do
       subject.create
-      assert File.exist?('lib/models/artist.rb')
+      assert File.exist?("lib/models/artist.rb")
     end
   end
 
-  describe '#create_migration' do
-    it 'creates a migration file' do
+  describe "#create_migration" do
+    it "creates a migration file" do
       subject.create_migration
       assert_equal 1, Dir.glob("db/migrate/*_create_artists.rb").size
     end
   end
 
-  describe '#create_test' do
-    it 'creates a model test file' do
+  describe "#create_test" do
+    it "creates a model test file" do
       subject.create_test
-      assert File.exist?('spec/models/artist_spec.rb')
+      assert File.exist?("spec/models/artist_spec.rb")
     end
   end
 end
diff --git a/spec/commands/generator/schema_spec.rb b/spec/commands/generator/schema_spec.rb
index 6a48d5e4..1b77b251 100644
--- a/spec/commands/generator/schema_spec.rb
+++ b/spec/commands/generator/schema_spec.rb
@@ -1,11 +1,13 @@
-require 'pliny/commands/creator'
-require 'pliny/commands/generator'
-require 'pliny/commands/generator/schema'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/creator"
+require "pliny/commands/generator"
+require "pliny/commands/generator/schema"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Schema do
   let(:stream) { StringIO.new }
-  subject { Pliny::Commands::Generator::Schema.new('artist', {}, stream) }
+  subject { Pliny::Commands::Generator::Schema.new("artist", {}, stream) }
 
   around do |example|
     Dir.mktmpdir do |dir|
@@ -16,66 +18,65 @@
     end
   end
 
-
-  describe '#create' do
-    context 'with new layout' do
+  describe "#create" do
+    context "with new layout" do
       before do
         subject.create
       end
 
-      it 'creates a schema' do
-        assert File.exist?('schema/schemata/artist.yaml')
+      it "creates a schema" do
+        assert File.exist?("schema/schemata/artist.yaml")
       end
     end
 
-    context 'with legacy layout' do
+    context "with legacy layout" do
       before do
-        FileUtils.mkdir_p('./docs/schema/schemata')
-        FileUtils.cp('./schema/meta.json', './docs/schema')
+        FileUtils.mkdir_p("./docs/schema/schemata")
+        FileUtils.cp("./schema/meta.json", "./docs/schema")
         subject.create
       end
 
-      it 'creates a legacy schema' do
-        assert File.exist?('docs/schema/schemata/artist.yaml')
+      it "creates a legacy schema" do
+        assert File.exist?("docs/schema/schemata/artist.yaml")
       end
 
-      it 'warns' do
+      it "warns" do
         assert_match(/WARNING/m, stream.string)
       end
     end
   end
 
-  describe '#rebuild' do
-    context 'with nil as the name argument (as used in schema.rake)' do
-      it 'rebuilds the schema with prmd' do
+  describe "#rebuild" do
+    context "with nil as the name argument (as used in schema.rake)" do
+      it "rebuilds the schema with prmd" do
         assert_output(/rebuilt/) do
           Pliny::Commands::Generator::Schema.new(nil).rebuild
         end
       end
     end
 
-    context 'with new layout' do
+    context "with new layout" do
       before do
         subject.rebuild
       end
 
-      it 'rebuilds schema.json' do
-        assert File.exist?('./schema/schema.json')
+      it "rebuilds schema.json" do
+        assert File.exist?("./schema/schema.json")
       end
     end
 
-    context 'with legacy layout' do
+    context "with legacy layout" do
       before do
-        FileUtils.mkdir_p('./docs/schema/schemata')
-        FileUtils.cp('./schema/meta.json', './docs/schema')
+        FileUtils.mkdir_p("./docs/schema/schemata")
+        FileUtils.cp("./schema/meta.json", "./docs/schema")
         subject.rebuild
       end
 
-      it 'rebuilds legacy schema.json' do
-        assert File.exist?('docs/schema.json')
+      it "rebuilds legacy schema.json" do
+        assert File.exist?("docs/schema.json")
       end
 
-      it 'warns' do
+      it "warns" do
         assert_match(/WARNING/m, stream.string)
       end
     end
diff --git a/spec/commands/generator/serializer_spec.rb b/spec/commands/generator/serializer_spec.rb
index 7f0745b8..c07db59f 100644
--- a/spec/commands/generator/serializer_spec.rb
+++ b/spec/commands/generator/serializer_spec.rb
@@ -1,24 +1,26 @@
-require 'pliny/commands/generator/serializer'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/generator/serializer"
+require "spec_helper"
 
 describe Pliny::Commands::Generator::Serializer do
-  subject { described_class.new('artist', {}, StringIO.new) }
+  subject { described_class.new("artist", {}, StringIO.new) }
 
   around do |example|
     Dir.chdir(Dir.mktmpdir, &example)
   end
 
-  describe '#create' do
-    it 'creates a serializer file' do
+  describe "#create" do
+    it "creates a serializer file" do
       subject.create
-      assert File.exist?('lib/serializers/artist.rb')
+      assert File.exist?("lib/serializers/artist.rb")
     end
   end
 
-  describe '#create_test' do
-    it 'creates a serializer test file' do
+  describe "#create_test" do
+    it "creates a serializer test file" do
       subject.create_test
-      assert File.exist?('spec/serializers/artist_spec.rb')
+      assert File.exist?("spec/serializers/artist_spec.rb")
     end
   end
 end
diff --git a/spec/commands/generator_spec.rb b/spec/commands/generator_spec.rb
index fffeb398..0e2803df 100644
--- a/spec/commands/generator_spec.rb
+++ b/spec/commands/generator_spec.rb
@@ -1,7 +1,9 @@
-require 'pliny/commands/creator'
-require 'pliny/commands/generator'
-require 'pliny/commands/generator/base'
-require 'spec_helper'
+# frozen_string_literal: true
+
+require "pliny/commands/creator"
+require "pliny/commands/generator"
+require "pliny/commands/generator/base"
+require "spec_helper"
 
 describe Pliny::Commands::Generator do
   subject { Pliny::Commands::Generator.new }
@@ -25,139 +27,139 @@
     Timecop.return
   end
 
-  describe '#endpoint' do
+  describe "#endpoint" do
     before do
-      subject.endpoint('artists')
+      subject.endpoint("artists")
     end
 
-    it 'creates a new endpoint module' do
-      assert File.exist?('lib/endpoints/artists.rb')
+    it "creates a new endpoint module" do
+      assert File.exist?("lib/endpoints/artists.rb")
     end
 
-    it 'creates an endpoint test' do
-      assert File.exist?('spec/endpoints/artists_spec.rb')
+    it "creates an endpoint test" do
+      assert File.exist?("spec/endpoints/artists_spec.rb")
     end
 
-    it 'creates an endpoint acceptance test' do
-      assert File.exist?('spec/acceptance/artists_spec.rb')
+    it "creates an endpoint acceptance test" do
+      assert File.exist?("spec/acceptance/artists_spec.rb")
     end
   end
 
-  describe '#mediator' do
+  describe "#mediator" do
     before do
-      subject.mediator('artists/creator')
+      subject.mediator("artists/creator")
     end
 
-    it 'creates a new mediator module' do
-      assert File.exist?('lib/mediators/artists/creator.rb')
+    it "creates a new mediator module" do
+      assert File.exist?("lib/mediators/artists/creator.rb")
     end
 
-    it 'creates a test' do
-      assert File.exist?('spec/mediators/artists/creator_spec.rb')
+    it "creates a test" do
+      assert File.exist?("spec/mediators/artists/creator_spec.rb")
     end
   end
 
-  describe '#model' do
-    describe 'simple model' do
+  describe "#model" do
+    describe "simple model" do
       before do
-        subject.model('artist')
+        subject.model("artist")
       end
 
-      it 'creates a migration' do
+      it "creates a migration" do
         assert File.exist?("db/migrate/#{@t.to_i}_create_artists.rb")
       end
 
-      it 'creates the actual model' do
-        assert File.exist?('lib/models/artist.rb')
+      it "creates the actual model" do
+        assert File.exist?("lib/models/artist.rb")
       end
 
-      it 'creates a test' do
-        assert File.exist?('spec/models/artist_spec.rb')
+      it "creates a test" do
+        assert File.exist?("spec/models/artist_spec.rb")
       end
     end
 
-    describe 'model in nested class' do
+    describe "model in nested class" do
       before do
-        subject.model('administration/user')
+        subject.model("administration/user")
       end
 
-      it 'creates a migration' do
+      it "creates a migration" do
         assert File.exist?("db/migrate/#{@t.to_i}_create_administration_users.rb")
       end
 
-      it 'creates the actual model' do
-        assert File.exist?('lib/models/administration/user.rb')
+      it "creates the actual model" do
+        assert File.exist?("lib/models/administration/user.rb")
       end
 
-      it 'creates a test' do
-        assert File.exist?('spec/models/administration/user_spec.rb')
+      it "creates a test" do
+        assert File.exist?("spec/models/administration/user_spec.rb")
       end
     end
   end
 
-  describe '#scaffold' do
+  describe "#scaffold" do
     before do
-      subject.scaffold('artist')
+      subject.scaffold("artist")
     end
 
-    it 'creates a new endpoint module' do
-      assert File.exist?('lib/endpoints/artists.rb')
+    it "creates a new endpoint module" do
+      assert File.exist?("lib/endpoints/artists.rb")
     end
 
-    it 'creates an endpoint test' do
-      assert File.exist?('spec/endpoints/artists_spec.rb')
+    it "creates an endpoint test" do
+      assert File.exist?("spec/endpoints/artists_spec.rb")
     end
 
-    it 'creates an endpoint acceptance test' do
-      assert File.exist?('spec/acceptance/artists_spec.rb')
+    it "creates an endpoint acceptance test" do
+      assert File.exist?("spec/acceptance/artists_spec.rb")
     end
 
-    it 'creates a migration' do
+    it "creates a migration" do
       assert File.exist?("db/migrate/#{@t.to_i}_create_artists.rb")
     end
 
-    it 'creates the actual model' do
-      assert File.exist?('lib/models/artist.rb')
+    it "creates the actual model" do
+      assert File.exist?("lib/models/artist.rb")
     end
 
-    it 'creates a test' do
-      assert File.exist?('spec/models/artist_spec.rb')
+    it "creates a test" do
+      assert File.exist?("spec/models/artist_spec.rb")
     end
 
-    it 'creates a schema' do
-      assert File.exist?('schema/schemata/artist.yaml')
+    it "creates a schema" do
+      assert File.exist?("schema/schemata/artist.yaml")
     end
 
-    it 'creates a new serializer module' do
-      assert File.exist?('lib/serializers/artist.rb')
+    it "creates a new serializer module" do
+      assert File.exist?("lib/serializers/artist.rb")
     end
 
-    it 'creates a test' do
-      assert File.exist?('spec/serializers/artist_spec.rb')
+    it "creates a test" do
+      assert File.exist?("spec/serializers/artist_spec.rb")
     end
   end
 
-  describe '#schema' do
+  describe "#schema" do
     before do
-      subject.schema('artist')
+      subject.schema("artist")
     end
 
-    it 'creates a schema' do
-      assert File.exist?('schema/schemata/artist.yaml')
+    it "creates a schema" do
+      assert File.exist?("schema/schemata/artist.yaml")
     end
   end
 
-  describe '#serializer' do
+  describe "#serializer" do
     before do
-      subject.serializer('artist')
+      subject.serializer("artist")
     end
 
-    it 'creates a new serializer module' do
-      assert File.exist?('lib/serializers/artist.rb')
+    it "creates a new serializer module" do
+      assert File.exist?("lib/serializers/artist.rb")
     end
 
-    it 'creates a test' do
-      assert File.exist?('spec/serializers/artist_spec.rb')
+    it "creates a test" do
+      assert File.exist?("spec/serializers/artist_spec.rb")
     end
   end
 end
diff --git a/spec/commands/updater_spec.rb b/spec/commands/updater_spec.rb
index 8ad79857..57b5b67c 100644
--- a/spec/commands/updater_spec.rb
+++ b/spec/commands/updater_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "pliny/commands/updater"
 require "spec_helper"
 
diff --git a/spec/config_helpers_spec.rb b/spec/config_helpers_spec.rb
index a61032c0..9ad59f85 100644
--- a/spec/config_helpers_spec.rb
+++ b/spec/config_helpers_spec.rb
@@ -1,13 +1,14 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 require "pliny/config_helpers"
 
 describe Pliny::CastingConfigHelpers do
-
   describe "#rack_env" do
     it "is development if app_env is development" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, 'development', string
+        override :app_env, "development", string
       end
 
       assert_equal "development", config.rack_env
@@ -16,7 +17,7 @@
     it "is development if app_env is test" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, 'test', string
+        override :app_env, "test", string
       end
 
       assert_equal "development", config.rack_env
@@ -25,7 +26,7 @@
     it "is deployment if app_env is production" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, 'production', string
+        override :app_env, "production", string
       end
 
       assert_equal "deployment", config.rack_env
@@ -34,7 +35,7 @@
     it "is deployment if app_env is nil" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, '', string
+        override :app_env, "", string
       end
 
       assert_equal "deployment", config.rack_env
@@ -43,7 +44,7 @@
     it "is deployment if app_env is another value" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, 'staging', string
+        override :app_env, "staging", string
       end
 
       assert_equal "deployment", config.rack_env
@@ -51,18 +52,18 @@
 
     context "when legacy PLINY_ENV is still defined" do
       before do
-        ENV['ORIGINAL_PLINY_ENV'] = ENV['PLINY_ENV']
-        ENV['PLINY_ENV'] = 'staging'
+        ENV["ORIGINAL_PLINY_ENV"] = ENV["PLINY_ENV"]
+        ENV["PLINY_ENV"] = "staging"
       end
 
       after do
-        ENV['PLINY_ENV'] = ENV.delete('ORIGINAL_PLINY_ENV')
+        ENV["PLINY_ENV"] = ENV.delete("ORIGINAL_PLINY_ENV")
       end
 
       it "uses PLINY_ENV value instead of APP_ENV" do
         config = Class.new do
           extend Pliny::CastingConfigHelpers
-          override :app_env, 'development', string
+          override :app_env, "development", string
         end
 
         assert_equal "deployment", config.rack_env
@@ -71,7 +72,7 @@
       it "displays deprecation warning" do
         config = Class.new do
           extend Pliny::CastingConfigHelpers
-          override :app_env, 'development', string
+          override :app_env, "development", string
         end
 
         io = StringIO.new
@@ -88,7 +89,7 @@
     it "displays deprecation warning if pliny_env is used" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, 'development', string
+        override :app_env, "development", string
       end
 
       io = StringIO.new
@@ -102,7 +103,7 @@
     it "returns app_env value" do
       config = Class.new do
         extend Pliny::CastingConfigHelpers
-        override :app_env, 'foo', string
+        override :app_env, "foo", string
       end
 
       assert_equal "foo", config.pliny_env
@@ -110,18 +111,18 @@
 
     context "when legacy PLINY_ENV is still defined" do
       before do
-        ENV['ORIGINAL_PLINY_ENV'] = ENV['PLINY_ENV']
-        ENV['PLINY_ENV'] = 'staging'
+        ENV["ORIGINAL_PLINY_ENV"] = ENV["PLINY_ENV"]
+        ENV["PLINY_ENV"] = "staging"
       end
 
       after do
-        ENV['PLINY_ENV'] = ENV.delete('ORIGINAL_PLINY_ENV')
+        ENV["PLINY_ENV"] = ENV.delete("ORIGINAL_PLINY_ENV")
       end
 
       it "returns PLINY_ENV value" do
         config = Class.new do
           extend Pliny::CastingConfigHelpers
-          override :app_env, 'development', string
+          override :app_env, "development", string
         end
 
         assert_equal "staging", config.pliny_env
diff --git a/spec/db_support_spec.rb b/spec/db_support_spec.rb
index 6744fc23..0a3a0809 100644
--- a/spec/db_support_spec.rb
+++ b/spec/db_support_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 require "pliny/db_support"
 
@@ -176,8 +178,8 @@
     end
   end
 
-  describe 'MigrationStatusPresenter' do
-    let(:filename) { '1630551344_latest_change.rb' }
+  describe "MigrationStatusPresenter" do
+    let(:filename) { "1630551344_latest_change.rb" }
     let(:up_migration) { described_class::MigrationStatus.new(filename: "00#{filename}") }
     let(:down_migration) { described_class::MigrationStatus.new(filename: "0#{filename}") }
     let(:file_missing_migration) { described_class::MigrationStatus.new(filename: "000#{filename}") }
@@ -193,79 +195,79 @@
       file_missing_migration.present_on_disk = false
     end
 
-    describe '#barrier_row' do
-      it 'pads to the longest_migration name' do
-        expectation = '+--------------+--------------------------------+'
+    describe "#barrier_row" do
+      it "pads to the longest_migration name" do
+        expectation = "+--------------+--------------------------------+"
         assert_equal expectation, presenter.barrier_row
       end
     end
 
-    describe '#header_row' do
-      it 'pads to the longest migration name' do
-        expectation = '|    STATUS    |           MIGRATION            |'
+    describe "#header_row" do
+      it "pads to the longest migration name" do
+        expectation = "|    STATUS    |           MIGRATION            |"
         assert_equal expectation, presenter.header_row
       end
     end
 
-    describe '#header' do
-      let(:barrier) { '+--------------+--------------------------------+' }
-      let(:header)  { '|    STATUS    |           MIGRATION            |' }
+    describe "#header" do
+      let(:barrier) { "+--------------+--------------------------------+" }
+      let(:header) { "|    STATUS    |           MIGRATION            |" }
 
-      it 'wraps the title in barriers' do
+      it "wraps the title in barriers" do
         assert_equal [barrier, header, barrier], presenter.header
       end
     end
 
-    describe '#footer' do
-      let(:barrier) { '+--------------+--------------------------------+' }
+    describe "#footer" do
+      let(:barrier) { "+--------------+--------------------------------+" }
 
-      it 'just a barrier' do
+      it "just a barrier" do
         assert_equal [barrier], presenter.footer
       end
     end
 
-    describe '#status_row' do
-      context 'an up migration' do
-        it 'shows the correct details' do
-          expectation = '|      UP      | 001630551344_latest_change.rb  |'
+    describe "#status_row" do
+      context "an up migration" do
+        it "shows the correct details" do
+          expectation = "|      UP      | 001630551344_latest_change.rb  |"
           assert_equal expectation, presenter.status_row(up_migration)
         end
       end
 
-      context 'a down migration' do
-        it 'shows the correct details' do
-          expectation = '|     DOWN     | 01630551344_latest_change.rb   |'
+      context "a down migration" do
+        it "shows the correct details" do
+          expectation = "|     DOWN     | 01630551344_latest_change.rb   |"
           assert_equal expectation, presenter.status_row(down_migration)
         end
       end
 
-      context 'a file missing migration' do
-        it 'shows the correct details' do
-          expectation = '| FILE MISSING | 0001630551344_latest_change.rb |'
+      context "a file missing migration" do
+        it "shows the correct details" do
+          expectation = "| FILE MISSING | 0001630551344_latest_change.rb |"
           assert_equal expectation, presenter.status_row(file_missing_migration)
         end
       end
     end
 
-    describe '#statuses' do
-      let(:up_expectation)           { '|      UP      | 001630551344_latest_change.rb  |' }
-      let(:down_expectation)         { '|     DOWN     | 01630551344_latest_change.rb   |' }
-      let(:file_missing_expectation) { '| FILE MISSING | 0001630551344_latest_change.rb |' }
+    describe "#statuses" do
+      let(:up_expectation) { "|      UP      | 001630551344_latest_change.rb  |" }
+      let(:down_expectation) { "|     DOWN     | 01630551344_latest_change.rb   |" }
+      let(:file_missing_expectation) { "| FILE MISSING | 0001630551344_latest_change.rb |" }
 
-      it 'returns strings' do
+      it "returns strings" do
         assert_equal [up_expectation, down_expectation, file_missing_expectation], presenter.statuses
       end
     end
 
-    describe '#rows' do
-      let(:barrier)                  { '+--------------+--------------------------------+' }
-      let(:header)                   { '|    STATUS    |           MIGRATION            |' }
-      let(:up_expectation)           { '|      UP      | 001630551344_latest_change.rb  |' }
-      let(:down_expectation)         { '|     DOWN     | 01630551344_latest_change.rb   |' }
-      let(:file_missing_expectation) { '| FILE MISSING | 0001630551344_latest_change.rb |' }
-      let(:footer)                   { '+--------------+--------------------------------+' }
+    describe "#rows" do
+      let(:barrier) { "+--------------+--------------------------------+" }
+      let(:header) { "|    STATUS    |           MIGRATION            |" }
+      let(:up_expectation) { "|      UP      | 001630551344_latest_change.rb  |" }
+      let(:down_expectation) { "|     DOWN     | 01630551344_latest_change.rb   |" }
+      let(:file_missing_expectation) { "| FILE MISSING | 0001630551344_latest_change.rb |" }
+      let(:footer) { "+--------------+--------------------------------+" }
 
-      it 'is the table as an array' do
+      it "is the table as an array" do
         expectation = [
           barrier,
           header,
@@ -273,15 +275,15 @@
           up_expectation,
           down_expectation,
           file_missing_expectation,
-          footer
+          footer,
         ]
 
         assert_equal expectation, presenter.rows
       end
     end
 
-    describe '#to_s' do
-      it 'is the table as a string' do
+    describe "#to_s" do
+      it "is the table as a string" do
         expectation = <<~OUTPUT.chomp
           +--------------+--------------------------------+
           |    STATUS    |           MIGRATION            |
@@ -297,8 +299,8 @@
     end
   end
 
-  describe '#status' do
-    let(:filename) { '1630551344_latest_change.rb' }
+  describe "#status" do
+    let(:filename) { "1630551344_latest_change.rb" }
     let(:up_migration) { "00#{filename}" }
     let(:down_migration) { "0#{filename}" }
     let(:file_missing_migration) { "000#{filename}" }
@@ -339,7 +341,7 @@
       end
     end
 
-    it 'returns a table string' do
+    it "returns a table string" do
       expectation = <<~OUTPUT.chomp
         +--------------+--------------------------------+
         |    STATUS    |           MIGRATION            |
diff --git a/spec/error_reporters/rollbar_spec.rb b/spec/error_reporters/rollbar_spec.rb
index 808f88cf..98043a8f 100644
--- a/spec/error_reporters/rollbar_spec.rb
+++ b/spec/error_reporters/rollbar_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 require "rollbar"
 require "pliny/error_reporters/rollbar"
@@ -7,8 +9,8 @@
 
   describe "#notify" do
     let(:exception) { StandardError.new("Something went wrong") }
-    let(:context)   { { step: :foo } }
-    let(:rack_env)  { { "rack.input" => StringIO.new } }
+    let(:context) { { step: :foo } }
+    let(:rack_env) { { "rack.input" => StringIO.new } }
 
     subject(:notify) do
       reporter.notify(exception, context: context, rack_env: rack_env)
@@ -29,7 +31,7 @@
       notify
       expect(::Rollbar).to have_received(:scoped).once.with(hash_including(
         request: instance_of(Proc),
-        custom: { step: :foo }
+        custom: { step: :foo },
       ))
     end
 
@@ -38,8 +40,8 @@
         { "rollbar.person_data" => {
           id: SecureRandom.uuid,
           email: "foo@bar.com",
-          username: "foo"
-        }}
+          username: "foo",
+        } }
       end
 
       it "adds person to the rollbar notification" do
@@ -66,7 +68,7 @@
 
       it "reports to Rollbar without request data in the scope" do
         notify
-        expect(Rollbar).to have_received(:scoped).once.with({ custom: {step: :foo} })
+        expect(Rollbar).to have_received(:scoped).once.with({ custom: { step: :foo } })
       end
 
       it "delegates to #report_exception_to_rollbar" do
diff --git a/spec/error_reporters_spec.rb b/spec/error_reporters_spec.rb
index 5ac9e4e8..64d38d3b 100644
--- a/spec/error_reporters_spec.rb
+++ b/spec/error_reporters_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::ErrorReporters do
@@ -7,8 +9,8 @@
 
   describe ".notify" do
     let(:exception) { RuntimeError.new }
-    let(:context)   { { context: "foo" } }
-    let(:rack_env)  { { rack_env: "bar" } }
+    let(:context) { { context: "foo" } }
+    let(:rack_env) { { rack_env: "bar" } }
 
     subject(:notify_reporter) do
       reporter.notify(exception, context: context, rack_env: rack_env)
diff --git a/spec/errors_spec.rb b/spec/errors_spec.rb
index 2c115aa2..7f0d8da0 100644
--- a/spec/errors_spec.rb
+++ b/spec/errors_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Errors do
@@ -9,7 +11,8 @@
 
   it "includes an HTTP error that will take generic parameters" do
     e = Pliny::Errors::HTTPStatusError.new(
-      "Custom HTTP error.", :custom_http_error, 499)
+      "Custom HTTP error.", :custom_http_error, 499,
+    )
     assert_equal "Custom HTTP error.", e.message
     assert_equal :custom_http_error, e.id
     assert_equal 499, e.status
diff --git a/spec/helpers/encode_spec.rb b/spec/helpers/encode_spec.rb
index 8f077756..c69e111b 100644
--- a/spec/helpers/encode_spec.rb
+++ b/spec/helpers/encode_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Helpers::Encode do
diff --git a/spec/helpers/params_spec.rb b/spec/helpers/params_spec.rb
index b6f66e8e..763fb025 100644
--- a/spec/helpers/params_spec.rb
+++ b/spec/helpers/params_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Helpers::Params do
@@ -11,35 +13,35 @@ def app
   end
 
   it "loads json params" do
-    post "/", {hello: "world"}.to_json, {"CONTENT_TYPE" => "application/json"}
+    post "/", { hello: "world" }.to_json, { "CONTENT_TYPE" => "application/json" }
     assert_equal "{\"hello\":\"world\"}", last_response.body
   end
 
   it "loads json array of params" do
-    post "/", [{hello: "world"}, {goodbye: "moon"}].to_json, {"CONTENT_TYPE" => "application/json"}
+    post "/", [{ hello: "world" }, { goodbye: "moon" }].to_json, { "CONTENT_TYPE" => "application/json" }
     assert_equal "[{\"hello\":\"world\"},{\"goodbye\":\"moon\"}]", last_response.body
   end
 
   it "loads json array of arrays of params" do
-    post "/", [[{hello: "world"}], [{goodbye: "moon"}]].to_json, {"CONTENT_TYPE" => "application/json"}
+    post "/", [[{ hello: "world" }], [{ goodbye: "moon" }]].to_json, { "CONTENT_TYPE" => "application/json" }
     assert_equal "[[{\"hello\":\"world\"}],[{\"goodbye\":\"moon\"}]]", last_response.body
   end
 
   it "loads form data params" do
-    post "/", {hello: "world"}
+    post "/", { hello: "world" }
     assert_equal "{\"hello\":\"world\"}", last_response.body
   end
 
   it "loads from an unknown content type" do
-    post "/", "<hello>world</hello>", {"CONTENT_TYPE" => "application/xml"}
+    post "/", "<hello>world</hello>", { "CONTENT_TYPE" => "application/xml" }
     assert_equal "{}", last_response.body
   end
 
   it "should throw bad request when receiving invalid json via post" do
     err = assert_raises(Pliny::Errors::BadRequest) do
-      post "/", "{\"foo\"}", {"CONTENT_TYPE" => "application/json"}
+      post "/", "{\"foo\"}", { "CONTENT_TYPE" => "application/json" }
     end
 
-    assert_match /expected ':' after object key at line 1 column 7/, err.message
+    assert_match(/expected ':' after object key at line 1 column 7/, err.message)
   end
 end
diff --git a/spec/helpers/serialize_spec.rb b/spec/helpers/serialize_spec.rb
index c56eaabc..f3dcf08b 100644
--- a/spec/helpers/serialize_spec.rb
+++ b/spec/helpers/serialize_spec.rb
@@ -1,5 +1,16 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
+class Serializer
+  def initialize(opts)
+  end
+
+  def serialize(data)
+    data
+  end
+end
+
 describe Pliny::Helpers::Serialize do
   context "without a serializer" do
     def app
@@ -20,13 +31,6 @@ def app
   end
 
   context "with a serializer" do
-    class Serializer
-      def initialize(opts); end
-      def serialize(data)
-        data
-      end
-    end
-
     def app
       Sinatra.new do
         register Pliny::Helpers::Serialize
diff --git a/spec/helpers/zulu_time_spec.rb b/spec/helpers/zulu_time_spec.rb
index d4ca9a01..d35ade68 100644
--- a/spec/helpers/zulu_time_spec.rb
+++ b/spec/helpers/zulu_time_spec.rb
@@ -1,11 +1,13 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
+class ZuluTimeTest
+  extend Pliny::Helpers::ZuluTime
+end
+
 describe Pliny::Helpers::ZuluTime do
   context "zulu_time" do
-    class ZuluTimeTest
-      extend Pliny::Helpers::ZuluTime
-    end
-
     it "it formats Time instances" do
       formatted = ZuluTimeTest.zulu_time(Time.parse("2017-11-28T21:49:52.123+00:00"))
       assert_equal "2017-11-28T21:49:52Z", formatted
diff --git a/spec/integration_spec.rb b/spec/integration_spec.rb
index f1997676..bec98721 100644
--- a/spec/integration_spec.rb
+++ b/spec/integration_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 require "open3"
 
@@ -79,41 +81,41 @@
 
     it "returns a migration in the DOWN state when not migrated" do
       bash "pliny-generate model artist"
-      migration_file = Dir.glob('db/migrate/*').first
+      migration_file = Dir.glob("db/migrate/*").first
 
-      stdout, stderr = bash_with_output("rake db:migrate:status")
+      stdout, _ = bash_with_output("rake db:migrate:status")
 
-      statuses = Hash[stdout.to_s.split(/\+[-]+\+[-]+\+/)[2..-1].map { |s| s.tr("\n", "") }.select(&:present?).map { |s| s.split("|").map { |s| s.tr(" ", "") }.select(&:present?).reverse }]
+      statuses = stdout.to_s.split(/\+-+\+-+\+/)[2..].map { |s| s.tr("\n", "") }.select(&:present?).map { |s| s.split("|").map { |s| s.tr(" ", "") }.select(&:present?).reverse }.to_h
       assert statuses[migration_file.split("/").last] == "DOWN"
     end
 
     it "returns a migration in the UP state when not migrated" do
       bash "pliny-generate model artist"
-      migration_file = Dir.glob('db/migrate/*').first
+      migration_file = Dir.glob("db/migrate/*").first
       bash "rake db:migrate"
 
-      stdout, stderr = bash_with_output("rake db:migrate:status")
+      stdout, _ = bash_with_output("rake db:migrate:status")
 
-      statuses = Hash[stdout.to_s.split(/\+[-]+\+[-]+\+/)[2..-1].map { |s| s.tr("\n", "") }.select(&:present?).map { |s| s.split("|").map { |s| s.tr(" ", "") }.select(&:present?).reverse }]
+      statuses = stdout.to_s.split(/\+-+\+-+\+/)[2..].map { |s| s.tr("\n", "") }.select(&:present?).map { |s| s.split("|").map { |s| s.tr(" ", "") }.select(&:present?).reverse }.to_h
       assert statuses[migration_file.split("/").last] == "UP"
     end
 
     it "returns a migration in the FILE MISSING state when the file is missing" do
       bash "pliny-generate model artist"
-      migration_file = Dir.glob('db/migrate/*').first
+      migration_file = Dir.glob("db/migrate/*").first
       bash "rake db:migrate"
 
       FileUtils.rm_f(migration_file)
 
-      stdout, stderr = bash_with_output("rake db:migrate:status")
+      stdout, _ = bash_with_output("rake db:migrate:status")
 
-      statuses = Hash[stdout.to_s.split(/\+[-]+\+[-]+\+/)[2..-1].map { |s| s.tr("\n", "") }.select(&:present?).map { |s| s.split("|").map { |s| s.gsub(/(^[ ]+|[ ]+$)/, "") }.select(&:present?).reverse }]
+      statuses = stdout.to_s.split(/\+-+\+-+\+/)[2..].map { |s| s.tr("\n", "") }.select(&:present?).map { |s| s.split("|").map { |s| s.gsub(/(^ +| +$)/, "") }.select(&:present?).reverse }.to_h
       assert statuses[migration_file.split("/").last] == "FILE MISSING"
     end
   end
 
   def bash_with_output(cmd)
-    bin  = File.expand_path('../bin', File.dirname(__FILE__))
+    bin = File.expand_path("../bin", File.dirname(__FILE__))
     path = "#{bin}:#{ENV["PATH"]}"
     env = { "PATH" => path }
     stdout, stderr, status = Open3.capture3(env, cmd)
@@ -122,11 +124,11 @@ def bash_with_output(cmd)
       raise "Failed to run #{cmd}, error was #{stderr}"
     end
 
-    return stdout, stderr
+    [stdout, stderr]
   end
 
   def bash(cmd)
-    bin  = File.expand_path('../bin', File.dirname(__FILE__))
+    bin = File.expand_path("../bin", File.dirname(__FILE__))
     path = "#{bin}:#{ENV["PATH"]}"
     env = { "PATH" => path }
     unless system(env, "#{cmd} > /dev/null")
diff --git a/spec/log_spec.rb b/spec/log_spec.rb
index bace7e22..1c705be8 100644
--- a/spec/log_spec.rb
+++ b/spec/log_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Log do
@@ -66,7 +68,7 @@
   it "local context does not overwrite default context" do
     Pliny.default_context = { app: "pliny" }
     expect(@io).to receive(:print).with("app=not_pliny foo=bar\n")
-    Pliny.log(app: 'not_pliny', foo: "bar")
+    Pliny.log(app: "not_pliny", foo: "bar")
     assert Pliny.default_context[:app] == "pliny"
   end
 
@@ -95,20 +97,20 @@
   end
 
   describe "scrubbing" do
-
     it "allows a Proc to be assigned as a log scrubber" do
-      Pliny.log_scrubber = -> (hash) { hash }
+      Pliny.log_scrubber = ->(hash) { hash }
 
       begin
         Pliny.log_scrubber = Object.new
         fail
-      rescue ArgumentError; end
+      rescue ArgumentError
+      end
     end
 
     describe "when a scrubber is present" do
       before do
-        Pliny.log_scrubber = -> (hash) {
-          Hash.new.tap do |h|
+        Pliny.log_scrubber = ->(hash) {
+          {}.tap do |h|
             hash.keys.each do |k|
               h[k] = "*SCRUBBED*"
             end
diff --git a/spec/metrics/backends/logger_spec.rb b/spec/metrics/backends/logger_spec.rb
index caf91467..c898cabc 100644
--- a/spec/metrics/backends/logger_spec.rb
+++ b/spec/metrics/backends/logger_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Metrics::Backends::Logger do
@@ -18,27 +20,29 @@
 
   context "#count" do
     it "logs a single key with a value" do
-      backend.report_counts('app.foo' => 1)
+      backend.report_counts("app.foo" => 1)
       expect(io).to have_received(:print).with("count#app.foo=1\n")
     end
 
     it "logs multiple keys with values" do
-      backend.report_counts('app.foo' => 1, 'app.bar' => 2)
+      backend.report_counts("app.foo" => 1, "app.bar" => 2)
       expect(io).to have_received(:print).with(
-        "count#app.foo=1 count#app.bar=2\n")
+        "count#app.foo=1 count#app.bar=2\n",
+      )
     end
   end
 
   context "#measure" do
     it "logs a single key with a value" do
-      backend.report_measures('pliny.foo' => 0.001)
+      backend.report_measures("pliny.foo" => 0.001)
       expect(io).to have_received(:print).with("measure#pliny.foo=0.001\n")
     end
 
     it "logs multiple keys with values" do
-      backend.report_measures('pliny.foo' => 0.3, 'pliny.bar' => 0.5)
+      backend.report_measures("pliny.foo" => 0.3, "pliny.bar" => 0.5)
       expect(io).to have_received(:print).with(
-        "measure#pliny.foo=0.300 measure#pliny.bar=0.500\n")
+        "measure#pliny.foo=0.300 measure#pliny.bar=0.500\n",
+      )
     end
   end
 end
diff --git a/spec/metrics_spec.rb b/spec/metrics_spec.rb
index 4735437d..3d4c617e 100644
--- a/spec/metrics_spec.rb
+++ b/spec/metrics_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Metrics do
@@ -8,7 +10,7 @@
   end
 
   before do
-    allow(Config).to receive(:app_name).and_return('pliny')
+    allow(Config).to receive(:app_name).and_return("pliny")
   end
 
   around do |example|
@@ -41,7 +43,7 @@
       metrics.count(:foo, :bar)
       expect(test_backend).to have_received(:report_counts).once.with(
         "pliny.foo" => 1,
-        "pliny.bar" => 1
+        "pliny.bar" => 1,
       )
     end
   end
@@ -57,9 +59,9 @@
     end
 
     it "measures a block's execution time with a single key" do
-      metrics.measure(:foo) { }
+      metrics.measure(:foo) {}
       expect(test_backend).to have_received(:report_measures).once.with(
-        "pliny.foo" => 0
+        "pliny.foo" => 0,
       )
     end
 
@@ -69,37 +71,37 @@
       end
 
       expect(test_backend).to have_received(:report_measures) do |opts|
-        assert(60 <= opts['pliny.foo'] && opts['pliny.foo'] <= 61)
+        assert(opts["pliny.foo"].between?(60, 61))
       end
     end
 
     it "measures a block's execution time with multiple keys" do
-      metrics.measure(:foo, :bar) { }
+      metrics.measure(:foo, :bar) {}
       expect(test_backend).to have_received(:report_measures).once.with(
         "pliny.foo" => 0,
-        "pliny.bar" => 0
+        "pliny.bar" => 0,
       )
     end
 
     it "measures a given value for a single key without a block" do
       metrics.measure(:baz, value: 3.14)
       expect(test_backend).to have_received(:report_measures).once.with(
-        "pliny.baz" => 3.14
+        "pliny.baz" => 3.14,
       )
     end
 
     it "measures a given value for multiple keys with a block" do
-      metrics.measure(:qux, :corge, value: 42) { }
+      metrics.measure(:qux, :corge, value: 42) {}
       expect(test_backend).to have_received(:report_measures).once.with(
         "pliny.qux" => 42,
-        "pliny.corge" => 42
+        "pliny.corge" => 42,
       )
     end
 
     it "measures a value of 0 when no key or block is provided" do
       metrics.measure(:waldo)
       expect(test_backend).to have_received(:report_measures).once.with(
-        "pliny.waldo" => 0
+        "pliny.waldo" => 0,
       )
     end
 
@@ -107,7 +109,7 @@
       metrics.measure("metric.name", "another.name", value: 3.14, foo: :bar)
       expect(test_backend).to have_received(:report_measures).once.with(
         "pliny.metric.name" => 3.14,
-        "pliny.another.name" => 3.14
+        "pliny.another.name" => 3.14,
       )
     end
 
@@ -115,7 +117,7 @@
       metrics.measure("metric.name", "another.name", { value: 3.14, foo: :bar })
       expect(test_backend).to have_received(:report_measures).once.with(
         "pliny.metric.name" => 3.14,
-        "pliny.another.name" => 3.14
+        "pliny.another.name" => 3.14,
       )
     end
   end
diff --git a/spec/middleware/canonical_log_line_spec.rb b/spec/middleware/canonical_log_line_spec.rb
index 51888d9e..f4f8735f 100644
--- a/spec/middleware/canonical_log_line_spec.rb
+++ b/spec/middleware/canonical_log_line_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::CanonicalLogLine do
@@ -7,7 +9,7 @@ def app
         use Pliny::Middleware::RequestID
 
         use Pliny::Middleware::CanonicalLogLine,
-          emitter: -> (data) { Pliny.log_without_context(data) }
+          emitter: ->(data) { Pliny.log_without_context(data) }
 
         use Pliny::Middleware::RescueErrors, raise: false
 
@@ -48,7 +50,8 @@ def app
 
   it "never fails a request on failure" do
     expect(Pliny).to receive(:log).with(
-      message: "Failed to emit canonical log line")
+      message: "Failed to emit canonical log line",
+    )
     expect(Pliny).to receive(:log_without_context) { |d| raise "bang!" }
 
     get "/apps/123"
diff --git a/spec/middleware/cors_spec.rb b/spec/middleware/cors_spec.rb
index 3dcd246b..7bad0b8e 100644
--- a/spec/middleware/cors_spec.rb
+++ b/spec/middleware/cors_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::CORS do
diff --git a/spec/middleware/instruments_spec.rb b/spec/middleware/instruments_spec.rb
index 8a3626d9..b0499b78 100644
--- a/spec/middleware/instruments_spec.rb
+++ b/spec/middleware/instruments_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::Instruments do
@@ -25,17 +27,17 @@ def app
   it "performs logging" do
     expect(Pliny).to receive(:log).with(hash_including(
       instrumentation: true,
-      at:              "start",
-      method:          "GET",
-      path:            "/apps/123",
+      at: "start",
+      method: "GET",
+      path: "/apps/123",
     ))
     expect(Pliny).to receive(:log).with(hash_including(
       instrumentation: true,
-      at:              "finish",
-      method:          "GET",
-      path:            "/apps/123",
+      at: "finish",
+      method: "GET",
+      path: "/apps/123",
       route_signature: "/apps/:id",
-      status:          201
+      status: 201,
     ))
     get "/apps/123"
   end
@@ -43,7 +45,7 @@ def app
   it "respects Pliny error status codes" do
     expect(Pliny).to receive(:log)
     expect(Pliny).to receive(:log).with(hash_including(
-      status: 404
+      status: 404,
     ))
     get "/error"
   end
diff --git a/spec/middleware/metrics_spec.rb b/spec/middleware/metrics_spec.rb
index 71150555..e142a73b 100644
--- a/spec/middleware/metrics_spec.rb
+++ b/spec/middleware/metrics_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::Instruments do
@@ -57,7 +59,7 @@ def app
   it "measures the request latency" do
     expect(Pliny::Metrics).to receive(:measure) do |key, opts|
       assert_equal(key, "requests.latency")
-      assert(4 < opts[:value] && opts[:value] < 6)
+      assert_in_delta(5, opts[:value], 1)
     end
 
     get "/hello"
diff --git a/spec/middleware/request_id_spec.rb b/spec/middleware/request_id_spec.rb
index ca254a95..faf3bdf7 100644
--- a/spec/middleware/request_id_spec.rb
+++ b/spec/middleware/request_id_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::RequestID do
diff --git a/spec/middleware/request_store/clear_spec.rb b/spec/middleware/request_store/clear_spec.rb
index ec7a19f0..7a6f7f14 100644
--- a/spec/middleware/request_store/clear_spec.rb
+++ b/spec/middleware/request_store/clear_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::RequestStore::Clear do
diff --git a/spec/middleware/request_store/seed_spec.rb b/spec/middleware/request_store/seed_spec.rb
index 8f0c709e..8006a2bf 100644
--- a/spec/middleware/request_store/seed_spec.rb
+++ b/spec/middleware/request_store/seed_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::RequestStore::Seed do
diff --git a/spec/middleware/rescue_errors_spec.rb b/spec/middleware/rescue_errors_spec.rb
index 14cb1ccf..c0906c1f 100644
--- a/spec/middleware/rescue_errors_spec.rb
+++ b/spec/middleware/rescue_errors_spec.rb
@@ -1,21 +1,21 @@
-require "spec_helper"
+# frozen_string_literal: true
 
-describe Pliny::Middleware::RescueErrors do
-  include Rack::Test::Methods
+require "spec_helper"
 
-  class BadMiddleware
-    def call(env)
-      if env["PATH_INFO"] == "/api-error"
-        raise Pliny::Errors::ServiceUnavailable
-      else
-        raise "Omg!"
-      end
+class BadMiddleware
+  def call(env)
+    if env["PATH_INFO"] == "/api-error"
+      raise Pliny::Errors::ServiceUnavailable
+    else
+      raise "Omg!"
     end
   end
+end
 
-  def app
-    @app
-  end
+describe Pliny::Middleware::RescueErrors do
+  include Rack::Test::Methods
+
+  attr_reader :app
 
   it "intercepts Pliny errors and renders" do
     @app = new_rack_app
diff --git a/spec/middleware/versioning_spec.rb b/spec/middleware/versioning_spec.rb
index 8f5b776f..26db30f3 100644
--- a/spec/middleware/versioning_spec.rb
+++ b/spec/middleware/versioning_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Middleware::Versioning do
@@ -10,7 +12,7 @@
   def app
     Rack::Builder.new do
       use Rack::Lint
-      use Pliny::Middleware::Versioning, default: '2', app_name: 'pliny'
+      use Pliny::Middleware::Versioning, default: "2", app_name: "pliny"
       run Sinatra.new {
         get "/" do
           JSON.generate env
@@ -20,48 +22,48 @@ def app
   end
 
   it "produces default version on application/json" do
-    get '/', {}, {'HTTP_ACCEPT' => 'application/json'}
+    get "/", {}, { "HTTP_ACCEPT" => "application/json" }
     json = JSON.parse(last_response.body)
-    assert_equal 'application/json', json['HTTP_ACCEPT']
-    assert_equal '2', json['HTTP_X_API_VERSION']
+    assert_equal "application/json", json["HTTP_ACCEPT"]
+    assert_equal "2", json["HTTP_X_API_VERSION"]
   end
 
   it "errors without a version specified on application/vnd.pliny+json" do
-    get '/', {}, {'HTTP_ACCEPT' => 'application/vnd.pliny+json'}
-    error = { id: :bad_version, message: <<-eos }
-Please specify a version along with the MIME type. For example, `Accept: application/vnd.pliny+json; version=1`.
-    eos
+    get "/", {}, { "HTTP_ACCEPT" => "application/vnd.pliny+json" }
+    error = { id: :bad_version, message: <<~EOS }
+      Please specify a version along with the MIME type. For example, `Accept: application/vnd.pliny+json; version=1`.
+    EOS
 
     assert_equal 400, last_response.status
     assert_equal JSON.generate(error), last_response.body
   end
 
   it "ignores a wrong app name" do
-    get '/', {}, {'HTTP_ACCEPT' => 'application/vnd.chuck_norris+json'}
+    get "/", {}, { "HTTP_ACCEPT" => "application/vnd.chuck_norris+json" }
     json = JSON.parse(last_response.body)
-    assert_equal 'application/vnd.chuck_norris+json', json['HTTP_ACCEPT']
-    assert_equal '2', json['HTTP_X_API_VERSION']
+    assert_equal "application/vnd.chuck_norris+json", json["HTTP_ACCEPT"]
+    assert_equal "2", json["HTTP_X_API_VERSION"]
   end
 
   it "produces a version on application/vnd.pliny+json; version=3" do
-    get '/', {}, {'HTTP_ACCEPT' => 'application/vnd.pliny+json; version=3'}
+    get "/", {}, { "HTTP_ACCEPT" => "application/vnd.pliny+json; version=3" }
     json = JSON.parse(last_response.body)
-    assert_equal 'application/json', json['HTTP_ACCEPT']
-    assert_equal '3', json['HTTP_X_API_VERSION']
+    assert_equal "application/json", json["HTTP_ACCEPT"]
+    assert_equal "3", json["HTTP_X_API_VERSION"]
   end
 
   # this behavior is pretty sketchy, but a pretty extreme edge case
   it "handles multiple MIME types" do
-    get '/', {}, {'HTTP_ACCEPT' => 'application/vnd.pliny+json; version=3; q=0.5, text/xml'}
+    get "/", {}, { "HTTP_ACCEPT" => "application/vnd.pliny+json; version=3; q=0.5, text/xml" }
     json = JSON.parse(last_response.body)
-    assert_equal 'text/xml, application/json; q=0.5', json['HTTP_ACCEPT']
-    assert_equal '3', json['HTTP_X_API_VERSION']
+    assert_equal "text/xml, application/json; q=0.5", json["HTTP_ACCEPT"]
+    assert_equal "3", json["HTTP_X_API_VERSION"]
   end
 
   it "produces the priority version on multiple types" do
-    get '/', {}, {'HTTP_ACCEPT' => 'application/vnd.pliny+json; version=4; q=0.5, application/vnd.pliny+json; version=3'}
+    get "/", {}, { "HTTP_ACCEPT" => "application/vnd.pliny+json; version=4; q=0.5, application/vnd.pliny+json; version=3" }
     json = JSON.parse(last_response.body)
-    assert_equal 'application/json, application/json; q=0.5', json['HTTP_ACCEPT']
-    assert_equal '3', json['HTTP_X_API_VERSION']
+    assert_equal "application/json, application/json; q=0.5", json["HTTP_ACCEPT"]
+    assert_equal "3", json["HTTP_X_API_VERSION"]
   end
 end
diff --git a/spec/request_store_spec.rb b/spec/request_store_spec.rb
index 76f4769c..64769412 100644
--- a/spec/request_store_spec.rb
+++ b/spec/request_store_spec.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::RequestStore do
   before do
     @env = {
-      "REQUEST_IDS" => ["abc", "def"]
+      "REQUEST_IDS" => ["abc", "def"],
     }
   end
 
diff --git a/spec/rollbar_logger_spec.rb b/spec/rollbar_logger_spec.rb
index 340b5251..0094f612 100644
--- a/spec/rollbar_logger_spec.rb
+++ b/spec/rollbar_logger_spec.rb
@@ -1,41 +1,43 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::RollbarLogger do
   subject(:logger) { Pliny::RollbarLogger.new }
 
-  let(:message) { 'hello world' }
+  let(:message) { "hello world" }
   let(:log_context) { { rollbar: true, level: level, message: message } }
 
   before do
     expect(Pliny).to receive(:log).with(log_context)
   end
 
-  context '#debug' do
-    let(:level) { 'debug' }
+  context "#debug" do
+    let(:level) { "debug" }
 
     it "proxies the debug log level" do
       logger.debug(message)
     end
   end
 
-  context '#info' do
-    let(:level) { 'info' }
+  context "#info" do
+    let(:level) { "info" }
 
     it "proxies the info log level" do
       logger.info(message)
     end
   end
 
-  context '#warn' do
-    let(:level) { 'warn' }
+  context "#warn" do
+    let(:level) { "warn" }
 
     it "proxies the warn log level" do
       logger.warn(message)
     end
   end
 
-  context '#error' do
-    let(:level) { 'error' }
+  context "#error" do
+    let(:level) { "error" }
 
     it "proxies the error log level" do
       logger.error(message)
diff --git a/spec/router_spec.rb b/spec/router_spec.rb
index 7a0fc950..8030cf45 100644
--- a/spec/router_spec.rb
+++ b/spec/router_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe Pliny::Router do
@@ -5,12 +7,12 @@
     def app
       Rack::Builder.new do
         use Rack::Lint
-        use Pliny::Middleware::Versioning, default: '2', app_name: 'pliny'
+        use Pliny::Middleware::Versioning, default: "2", app_name: "pliny"
 
         use Pliny::Router do
-          version '3' do
+          version "3" do
             mount Sinatra.new {
-              get '/' do
+              get "/" do
                 "API V3"
               end
             }
@@ -26,13 +28,13 @@ def app
     end
 
     it "should not run on any api" do
-      get '/'
-      assert_equal 'No API', last_response.body
+      get "/"
+      assert_equal "No API", last_response.body
     end
 
     it "should run on API V3" do
-      get '/', {}, {'HTTP_ACCEPT' => 'application/vnd.pliny+json; version=3'}
-      assert_equal 'API V3', last_response.body
+      get "/", {}, { "HTTP_ACCEPT" => "application/vnd.pliny+json; version=3" }
+      assert_equal "API V3", last_response.body
     end
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ec51dfed..b2595c09 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # make sure this is set before Sinatra is required
 ENV["RACK_ENV"] = "test"
 
@@ -35,7 +37,7 @@
   # order dependency and want to debug it, you can fix the order by providing
   # the seed, which is printed after each run.
   #     --seed 1234
-  config.order = 'random'
+  config.order = "random"
 
   # the rack app to be tested with rack-test:
   def app
diff --git a/spec/support/config.rb b/spec/support/config.rb
index 86e48f94..bd2a7672 100644
--- a/spec/support/config.rb
+++ b/spec/support/config.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "pliny/config_helpers"
 
 # Supress the "use RbConfig instead" warning.
diff --git a/spec/support/endpoints.rb b/spec/support/endpoints.rb
index d679afb8..2e87e78d 100644
--- a/spec/support/endpoints.rb
+++ b/spec/support/endpoints.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # create Endpoints::Base so we can test subclasses generated by Pliny:
 module Endpoints
   class Base < Sinatra::Base