diff --git a/Gemfile b/Gemfile
index 1e8eaef1..2573bed1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,6 +38,7 @@ platform :jruby do
 
   group :development do
     gem 'ruby-debug', require: nil
+    gem 'sass', require: nil
   end
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 23396e32..0e367264 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -124,6 +124,7 @@ GEM
     rmagick (2.13.2)
     rubyzip (1.1.2)
     safe_yaml (1.0.1)
+    sass (3.3.5)
     selenium-webdriver (2.40.0)
       childprocess (>= 0.5.0)
       multi_json (~> 1.0)
@@ -216,6 +217,7 @@ DEPENDENCIES
   rmagick
   ruby-debug
   rubyzip
+  sass
   selenium-webdriver
   sequel
   sequel_pg