diff --git a/Gemfile b/Gemfile
index ab27d84..98564f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem 'bcrypt-ruby', '~> 3.0.0'
 gem 'mysql2'
 
 # Use Uglifier as compressor for JavaScript assets
-gem 'uglifier', '>= 1.3.0'
+gem 'uglifier', '~> 2.7'
 
 # Use CoffeeScript for .js.coffee assets and views
 gem 'coffee-rails', '~> 4.0.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index d74d455..ef8c9a4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -154,9 +154,9 @@ GEM
       rails (>= 3.1)
       railties (>= 3.1)
     tzinfo (0.3.55)
-    uglifier (2.1.2)
+    uglifier (2.7.2)
       execjs (>= 0.3.0)
-      multi_json (~> 1.0, >= 1.0.2)
+      json (>= 1.8.0)
     unicorn (5.5.1)
       kgio (~> 2.6)
       rack
@@ -187,7 +187,7 @@ DEPENDENCIES
   therubyracer
   turbolinks
   twitter-bootstrap-rails
-  uglifier (>= 1.3.0)
+  uglifier (~> 2.7)
   unicorn
 
 BUNDLED WITH