diff --git a/config/environments/production.rb b/config/environments/production.rb
index 2c403cd..9acaab6 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -23,7 +23,8 @@
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  #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.