diff --git a/backend/lib/spree/backend.rb b/backend/lib/spree/backend.rb
index d7e0bd0e931..9fdf01fad4c 100644
--- a/backend/lib/spree/backend.rb
+++ b/backend/lib/spree/backend.rb
@@ -9,6 +9,7 @@
 require 'autoprefixer-rails'
 require 'jbuilder'
 require 'kaminari'
+require 'responders'
 
 require 'spree_core'
 require 'spree_api'
diff --git a/backend/solidus_backend.gemspec b/backend/solidus_backend.gemspec
index 6179f0cccb3..fcdf40cef54 100644
--- a/backend/solidus_backend.gemspec
+++ b/backend/solidus_backend.gemspec
@@ -29,6 +29,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'jbuilder', '~> 2.8'
   s.add_dependency 'jquery-rails'
   s.add_dependency 'kaminari', '~> 1.1'
+  s.add_dependency 'responders'
   s.add_dependency 'sassc-rails'
 
   s.add_dependency 'autoprefixer-rails'
diff --git a/frontend/solidus_frontend.gemspec b/frontend/solidus_frontend.gemspec
index 4b6af281f43..7a5d691f880 100644
--- a/frontend/solidus_frontend.gemspec
+++ b/frontend/solidus_frontend.gemspec
@@ -28,6 +28,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'font-awesome-rails', '~> 4.0'
   s.add_dependency 'jquery-rails'
   s.add_dependency 'kaminari', '~> 1.1'
+  s.add_dependency 'responders'
   s.add_dependency 'sassc-rails'
   s.add_dependency 'truncate_html', '~> 0.9', '>= 0.9.2'