diff --git a/Gemfile b/Gemfile
index 2128cb84..82a7da93 100644
--- a/Gemfile
+++ b/Gemfile
@@ -55,7 +55,7 @@ gem 'redis-rails'
 gem 'rubyzip', '>= 1.0.0'
 
 # URL validation
-gem 'addressable', '~> 2.5'
+gem 'addressable', '~> 2.8'
 
 gem 'puma', '~> 3.7'
 gem 'redis', '~> 3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 48900dd7..c9ed4e7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     animate-rails (1.0.10)
       rails
     archive-zip (0.7.0)
@@ -209,7 +209,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.1)
+    public_suffix (4.0.6)
     puma (3.11.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
@@ -385,7 +385,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  addressable (~> 2.5)
+  addressable (~> 2.8)
   animate-rails (= 1.0.10)
   bootstrap-sass (~> 3.3)
   bullet