diff --git a/config/environments/production.rb b/config/environments/production.rb
index c4328ec6..5e8e1f8c 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -25,7 +25,7 @@ Rails.application.configure do
   config.serve_static_assets = true
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  config.assets.js_compressor = Uglifier.new(:harmony => true)
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.