diff --git a/build/webpack.prod.conf.js b/build/webpack.prod.conf.js
index 418d5d1d66f..946a134a55a 100644
--- a/build/webpack.prod.conf.js
+++ b/build/webpack.prod.conf.js
@@ -9,7 +9,7 @@ const CopyWebpackPlugin = require('copy-webpack-plugin')
 const HtmlWebpackPlugin = require('html-webpack-plugin')
 const ScriptExtHtmlWebpackPlugin = require('script-ext-html-webpack-plugin')
 const MiniCssExtractPlugin = require('mini-css-extract-plugin')
-// const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin')
+const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin')
 const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
 
 function resolve(dir) {
@@ -140,7 +140,7 @@ const webpackConfig = merge(baseWebpackConfig, {
       }),
       // Compress extracted CSS. We are using this plugin so that possible
       // duplicated CSS from different components can be deduped.
-      // new OptimizeCSSAssetsPlugin()
+      new OptimizeCSSAssetsPlugin()
     ]
   }
 })