diff --git a/Gemfile b/Gemfile
index 354bd89b8..a40e59d5c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -56,6 +56,7 @@ group :development, :test do
   gem 'spring'
   gem 'spring-commands-rspec'
   gem 'konacha'
+  gem 'sprockets-rails', '< 3.0.0' # Compatibility issue with Konacha 3.7.0
   gem 'guard-konacha-rails'
   gem 'poltergeist', require: 'capybara/poltergeist'
   gem 'selenium-webdriver'
diff --git a/Gemfile.lock b/Gemfile.lock
index bc7518eaa..b4c9eeecf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
       rake (~> 10.4)
     arel (6.0.3)
     arrayfields (4.9.2)
-    ast (2.1.0)
+    ast (2.2.0)
     astrolabe (1.3.1)
       parser (~> 2.2)
     autoprefixer-rails (6.1.1)
@@ -109,9 +109,9 @@ GEM
     codeclimate-test-reporter (0.4.8)
       simplecov (>= 0.7.1, < 1.0.0)
     coderay (1.1.0)
-    coffee-rails (4.1.0)
+    coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.0)
+      railties (>= 4.0.0, < 5.1.x)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -252,7 +252,7 @@ GEM
       net-ssh (>= 2.6.5)
     net-ssh (2.9.2)
     netrc (0.11.0)
-    nokogiri (1.6.7)
+    nokogiri (1.6.7.1)
       mini_portile2 (~> 2.0.0.rc2)
     notiffany (0.0.8)
       nenv (~> 0.1)
@@ -523,6 +523,7 @@ DEPENDENCIES
   simplecov
   spring
   spring-commands-rspec
+  sprockets-rails (< 3.0.0)
   sqlite3
   state_machine (= 1.2.0)
   terminal-notifier-guard
diff --git a/vendor/cache/ast-2.1.0.gem b/vendor/cache/ast-2.1.0.gem
deleted file mode 100644
index 594a52df2..000000000
Binary files a/vendor/cache/ast-2.1.0.gem and /dev/null differ
diff --git a/vendor/cache/ast-2.2.0.gem b/vendor/cache/ast-2.2.0.gem
new file mode 100644
index 000000000..d5794298f
Binary files /dev/null and b/vendor/cache/ast-2.2.0.gem differ
diff --git a/vendor/cache/coffee-rails-4.1.0.gem b/vendor/cache/coffee-rails-4.1.0.gem
deleted file mode 100644
index 74775880a..000000000
Binary files a/vendor/cache/coffee-rails-4.1.0.gem and /dev/null differ
diff --git a/vendor/cache/coffee-rails-4.1.1.gem b/vendor/cache/coffee-rails-4.1.1.gem
new file mode 100644
index 000000000..726e8baa3
Binary files /dev/null and b/vendor/cache/coffee-rails-4.1.1.gem differ
diff --git a/vendor/cache/nokogiri-1.6.7.gem b/vendor/cache/nokogiri-1.6.7.1.gem
similarity index 72%
rename from vendor/cache/nokogiri-1.6.7.gem
rename to vendor/cache/nokogiri-1.6.7.1.gem
index 84870acee..d66d59703 100644
Binary files a/vendor/cache/nokogiri-1.6.7.gem and b/vendor/cache/nokogiri-1.6.7.1.gem differ