diff --git a/client/package.json b/client/package.json
index e28cf3723..435b617d4 100644
--- a/client/package.json
+++ b/client/package.json
@@ -58,7 +58,7 @@
     "webpack-dev-server": "~1.12.1"
   },
   "scripts": {
-    "build": "webpack -p --config webpack.production.config.js",
+    "build": "webpack --config webpack.production.config.js",
     "start": "node server.js",
     "start-production": "NODE_ENV=production node server.js",
     "test": "jest",
diff --git a/client/webpack.production.config.js b/client/webpack.production.config.js
index 89744be46..a8a4d6576 100644
--- a/client/webpack.production.config.js
+++ b/client/webpack.production.config.js
@@ -73,7 +73,9 @@ module.exports = {
   plugins: [
     new webpack.DefinePlugin(GLOBALS),
     new webpack.optimize.CommonsChunkPlugin('vendors', 'vendors.js'),
+    new webpack.optimize.OccurenceOrderPlugin(true),
     new webpack.optimize.UglifyJsPlugin({
+      sourceMap: false,
       compress: {
         warnings: false
       }