diff --git a/package.json b/package.json
index 6666d65cd5..36d9fc711a 100644
--- a/package.json
+++ b/package.json
@@ -67,6 +67,7 @@
     "@types/websocket": "0.0.33",
     "chai": "3.5.0",
     "chai-http": "3.0.0",
+    "compression-webpack-plugin": "0.4.0",
     "css-loader": "0.28.1",
     "event-stream": "3.3.4",
     "gulp": "3.9.1",
@@ -87,7 +88,7 @@
     "stylus-loader": "3.0.1",
     "swagger-jsdoc": "1.9.4",
     "tslint": "5.2.0",
-    "uglify-js": "git+https://github.com/mishoo/UglifyJS2.git#8f4b45f4f814c04918382949b4bcaf7a8d910281",
+    "uglify-js": "git+https://github.com/mishoo/UglifyJS2.git#harmony",
     "webpack": "2.5.1"
   },
   "dependencies": {
diff --git a/src/web/app/auth/view.pug b/src/web/app/auth/view.pug
index afa1e408f8..7fc4a2a70d 100644
--- a/src/web/app/auth/view.pug
+++ b/src/web/app/auth/view.pug
@@ -2,4 +2,4 @@ extends ../base
 
 block head
 	meta(name='viewport' content='width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no')
-	script(src=`/assets/auth.${version}.ja.js` async defer)
+	script(src=`/assets/auth.${version}.ja.js.gz` async defer)
diff --git a/src/web/app/client/script.js b/src/web/app/client/script.js
index 465d3edb38..c069b0ee89 100644
--- a/src/web/app/client/script.js
+++ b/src/web/app/client/script.js
@@ -16,7 +16,7 @@ const app = isMobile ? 'mobile' : 'desktop';
 
 // Load app script
 const script = document.createElement('script');
-script.setAttribute('src', `/assets/${app}.${VERSION}.${lang}.js`);
+script.setAttribute('src', `/assets/${app}.${VERSION}.${lang}.js.gz`);
 script.setAttribute('async', 'true');
 script.setAttribute('defer', 'true');
 head.appendChild(script);
diff --git a/src/web/app/dev/view.pug b/src/web/app/dev/view.pug
index 1a9a0e5bbd..9bba6c11c5 100644
--- a/src/web/app/dev/view.pug
+++ b/src/web/app/dev/view.pug
@@ -1,4 +1,4 @@
 extends ../base
 
 block head
-	script(src=`/assets/dev.${version}.js` async defer)
+	script(src=`/assets/dev.${version}.ja.js.gz` async defer)
diff --git a/webpack/plugins/compression.ts b/webpack/plugins/compression.ts
new file mode 100644
index 0000000000..89703680c1
--- /dev/null
+++ b/webpack/plugins/compression.ts
@@ -0,0 +1,9 @@
+/**
+ * Compressor
+ */
+
+const CompressionPlugin = require('compression-webpack-plugin');
+
+export default () => new CompressionPlugin({
+	deleteOriginalAssets: true
+});
diff --git a/webpack/plugins/index.ts b/webpack/plugins/index.ts
index 0692b9f8dd..8771a9bc5f 100644
--- a/webpack/plugins/index.ts
+++ b/webpack/plugins/index.ts
@@ -1,6 +1,8 @@
+import * as webpack from 'webpack';
 const StringReplacePlugin = require('string-replace-webpack-plugin');
 
 import constant from './const';
+import compression from './compression';
 
 const env = process.env.NODE_ENV;
 const isProduction = env === 'production';
@@ -12,8 +14,10 @@ export default () => {
 	];
 
 	if (isProduction) {
-		//plugins.push(new webpack.optimize.UglifyJsPlugin());
+		plugins.push(new webpack.optimize.UglifyJsPlugin());
 	}
 
+	plugins.push(compression());
+
 	return plugins;
 };