diff --git a/Gemfile b/Gemfile
index 5032e8f..6070721 100644
--- a/Gemfile
+++ b/Gemfile
@@ -99,6 +99,7 @@ group :heroku, :production do
   gem 'unicorn', require: false, platform: 'ruby'
 end
 
+gem 'therubyracer', :platform => :ruby  # C Ruby (MRI) or Rubinius, but NOT Windows
 gem 'sass-rails'
 gem 'coffee-rails'
 gem 'uglifier'
diff --git a/Gemfile.lock b/Gemfile.lock
index 8df877b..696cf71 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -161,6 +161,7 @@ GEM
     launchy (2.4.3-java)
       addressable (~> 2.3)
       spoon (~> 0.0.1)
+    libv8 (3.16.14.7)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
     meta_request (0.2.8)
@@ -280,6 +281,7 @@ GEM
     rake (10.4.2)
     rdoc (4.1.2)
       json (~> 1.4)
+    ref (1.0.5)
     request_store (1.1.0)
     responders (1.1.2)
       railties (>= 3.2, < 4.2)
@@ -351,6 +353,9 @@ GEM
       tins (~> 0.8)
     test-unit (3.0.8)
       power_assert
+    therubyracer (0.12.2)
+      libv8 (~> 3.16.14.0)
+      ref
     thor (0.19.1)
     thread_safe (0.3.4)
     thread_safe (0.3.4-java)
@@ -443,6 +448,7 @@ DEPENDENCIES
   rushover
   sass-rails
   test-unit
+  therubyracer
   timecop
   uglifier
   underscore-rails
--
libgit2 0.21.2