diff --git a/Gemfile b/Gemfile
index a7809c6..5b6c7e8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,8 @@
 source 'https://rubygems.org'
 ruby '~> 2.6.3'
 
-gem 'sinatra', '~> 1.4.4'
-gem 'sinatra-contrib', '~> 1.4.2'
+gem 'sinatra', '~> 3.0.4'
+gem 'sinatra-contrib', '~> 3.0.4'
 gem 'sinatra-flash', '~> 0.3.0'
 gem 'ims-lti', '~> 1.1.4'
 gem 'dm-core'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6cc6fd7..829ede0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,6 @@ GEM
   specs:
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    backports (3.18.1)
     builder (3.2.4)
     data_objects (0.10.17)
       addressable (~> 2.1)
@@ -30,29 +29,30 @@ GEM
       builder
       oauth (>= 0.4.5, < 0.6)
     json (1.8.6)
-    multi_json (1.14.1)
+    multi_json (1.15.0)
+    mustermann (3.0.0)
+      ruby2_keywords (~> 0.0.1)
     oauth (0.5.4)
     pg (1.2.3)
     public_suffix (4.0.5)
-    rack (1.6.13)
-    rack-protection (1.5.5)
+    rack (2.2.4)
+    rack-protection (3.0.4)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
-    sinatra-contrib (1.4.7)
-      backports (>= 2.0)
+    ruby2_keywords (0.0.5)
+    sinatra (3.0.4)
+      mustermann (~> 3.0)
+      rack (~> 2.2, >= 2.2.4)
+      rack-protection (= 3.0.4)
+      tilt (~> 2.0)
+    sinatra-contrib (3.0.4)
       multi_json
-      rack-protection
-      rack-test
-      sinatra (~> 1.4.0)
-      tilt (>= 1.3, < 3)
+      mustermann (~> 3.0)
+      rack-protection (= 3.0.4)
+      sinatra (= 3.0.4)
+      tilt (~> 2.0)
     sinatra-flash (0.3.0)
       sinatra (>= 1.0.0)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   ruby
@@ -66,8 +66,8 @@ DEPENDENCIES
   ims-lti (~> 1.1.4)
   json (~> 1.8.6)
   pg
-  sinatra (~> 1.4.4)
-  sinatra-contrib (~> 1.4.2)
+  sinatra (~> 3.0.4)
+  sinatra-contrib (~> 3.0.4)
   sinatra-flash (~> 0.3.0)
 
 RUBY VERSION