diff --git a/src/Squidex/app-config/webpack.config.js b/src/Squidex/app-config/webpack.config.js
index 46dc1d76b..d960816dc 100644
--- a/src/Squidex/app-config/webpack.config.js
+++ b/src/Squidex/app-config/webpack.config.js
@@ -25,9 +25,7 @@ const plugins = {
     // https://github.com/NMFR/optimize-css-assets-webpack-plugin
     OptimizeCSSAssetsPlugin: require("optimize-css-assets-webpack-plugin"),
     // https://github.com/jrparish/tslint-webpack-plugin
-    TsLintPlugin: require('tslint-webpack-plugin'),
-    // https://www.npmjs.com/package/@angular-devkit/build-optimizer
-    BuildOptimizer: require('@angular-devkit/build-optimizer')
+    TsLintPlugin: require('tslint-webpack-plugin')
 };
 
 module.exports = function (env) {
@@ -337,21 +335,6 @@ module.exports = function (env) {
         })
     }
 
-    // Optimization plugin for production build.
-    if (isProduction) {
-        config.module.rules.push({
-            test: /\.js$/,
-            use: [{
-                loader: '@angular-devkit/build-optimizer/webpack-loader?sourceMap=false',
-                options: {
-                    sourceMap: false
-                }
-            }]
-        });
-
-        config.plugins.push(new plugins.BuildOptimizer.BuildOptimizerWebpackPlugin());
-    }
-
     if (isProduction) {
         config.module.rules.push({
             test: /\.scss$/,