diff --git a/package.json b/package.json
index 25cc129..7b72c90 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   "scripts": {
     "dev": "node build/dev-server.js",
     "start": "node build/dev-server.js",
-    "build": "cross-env FULL_BUNDLE=false webpack --progress --config webpack.build.config.js",
+    "build": "cross-env FULL_BUNDLE=false webpack -p --progress --config webpack.build.config.js",
     "unit": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run",
     "unit:watch": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --watch",
     "e2e": "node test/e2e/runner.js",
diff --git a/webpack.build.config.js b/webpack.build.config.js
index a262974..1996524 100644
--- a/webpack.build.config.js
+++ b/webpack.build.config.js
@@ -63,8 +63,8 @@ module.exports = [
 
 		plugins: [
 			new webpack.DefinePlugin({
-				"process.env" : {
-					NODE_ENV : JSON.stringify("production")
+				'process.env' : {
+					NODE_ENV : '"production"'
 				}
 			}),
 			new webpack.optimize.UglifyJsPlugin({