diff --git a/package.json b/package.json
index c71a5b0..09ea46d 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "start": "concurrently --raw \"webpack-dev-server --open\" \"npm run test:watch\"",
     "demo": "npm start",
     "build:demo": "webpack -p",
-    "build:umd": "webpack --config webpack.config.umd.ts",
+    "build:umd": "webpack --mode=production --config webpack.config.umd.ts",
     "build:ngc": "ngc -p tsconfig-ngc.json",
     "build:dist": "npm run build:umd && npm run build:ngc",
     "build:clean": "del-cli dist",
diff --git a/webpack.config.umd.ts b/webpack.config.umd.ts
index cf3affb..c138678 100644
--- a/webpack.config.umd.ts
+++ b/webpack.config.umd.ts
@@ -37,11 +37,10 @@ export default {
   resolve: {
     extensions: ['.ts', '.js']
   },
+  optimization: {
+    minimize: true
+  },
   plugins: [
-    new webpack.optimize.UglifyJsPlugin({
-      include: /\.min\.js$/,
-      sourceMap: true
-    }),
     new webpack.ContextReplacementPlugin(
       /angular(\\|\/)core(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
       path.join(__dirname, 'src')