diff --git a/Gemfile b/Gemfile
index 80535e186a9da8c40cb17cc86a8f461775c2b50b..57600ed9f84ac889cf1eec23f40f9bc0130b9c1d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,6 @@ gem 'pkg-config'
 gem 'rails', '~> 5.0.2'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
-gem 'coffee-rails', '~> 4.1.0'
 gem 'jquery-rails'
 gem 'puma'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d203d33935cc4dfe39805d9b7bf59c458326030f..2f55abec713d62f6572ec4d1cdb9aa7bcd6d0388 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,13 +111,6 @@ GEM
     cocaine (0.5.8)
       climate_control (>= 0.0.3, < 1.0)
     coderay (1.1.1)
-    coffee-rails (4.1.1)
-      coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.1.x)
-    coffee-script (2.4.1)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.12.2)
     colorize (0.8.1)
     concurrent-ruby (1.0.5)
     connection_pool (2.2.1)
@@ -482,7 +475,6 @@ DEPENDENCIES
   capistrano-rbenv
   capistrano-yarn
   capybara
-  coffee-rails (~> 4.1.0)
   devise
   devise-two-factor
   doorkeeper