diff --git a/Gemfile b/Gemfile
index c1378f01f01..939523db3d2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -33,6 +33,7 @@ gem 'protected_attributes'
 gem 'actionpack-action_caching'
 gem 'activerecord-session_store'
 gem 'rails-observers'
+gem 'responders', '~> 2.0'
 
 gem 'coderay', '~> 1.1.0'
 gem 'rubytree', '~> 0.8.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 08d688fdb3b..e6f6639a911 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -378,6 +378,8 @@ GEM
       nokogiri
       uber (~> 0.0.7)
     request_store (1.1.0)
+    responders (2.1.0)
+      railties (>= 4.2.0, < 5)
     rest-client (1.6.9)
       mime-types (~> 1.16)
     roar (1.0.1)
@@ -565,6 +567,7 @@ DEPENDENCIES
   rdoc (>= 2.4.2)
   reform (~> 1.2.6)
   request_store (~> 1.1.0)
+  responders (~> 2.0)
   roar (~> 1.0.0)
   rspec (~> 3.3.0)
   rspec-activemodel-mocks