diff --git a/config/environments/production.rb b/config/environments/production.rb
index 70a7ce3d7..efe38d8b2 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -48,7 +48,7 @@ Rails.application.configure do
   # config.require_master_key = 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.