diff --git a/Gemfile b/Gemfile
index 5d6adb0..eb08acc 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,6 +11,7 @@ gem "knock"
 gem "active_model_serializers"
 gem "rolify"
 gem "apitome"
+gem "uglifier"
 
 group :developemnt, :test do
   gem "pry-byebug"
diff --git a/Gemfile.lock b/Gemfile.lock
index 3cc98e7..6c4a2e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,6 +73,7 @@ GEM
     domain_name (0.5.25)
       unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
+    execjs (2.6.0)
     factory_girl (4.5.0)
       activesupport (>= 3.0.0)
     factory_girl_rails (4.5.0)
@@ -248,6 +249,9 @@ GEM
     tins (1.6.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
+    uglifier (2.7.2)
+      execjs (>= 0.3.0)
+      json (>= 1.8.0)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.1)
@@ -286,6 +290,7 @@ DEPENDENCIES
   rubocop-rspec
   simplecov
   spring
+  uglifier
 
 BUNDLED WITH
    1.10.6