diff --git a/package.json b/package.json
index cf40a9b3..a7fcc1ca 100644
--- a/package.json
+++ b/package.json
@@ -67,6 +67,7 @@
     "zone.js": "^0.8.26"
   },
   "devDependencies": {
+    "@angular-devkit/build-angular": "~0.6.6",
     "@angular/cli": "^6.0.5",
     "@angular/compiler-cli": "6.0.3",
     "@ngtools/webpack": "^6.0.5",
@@ -86,11 +87,10 @@
     "karma-remap-coverage": "^0.1.5",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^2.0.4",
-    "mini-css-extract-plugin": "0.4.0",
+    "mini-css-extract-plugin": "^0.4.0",
     "tslint": "^5.10.0",
     "uglifyjs-webpack-plugin": "^1.2.5",
     "webpack-bundle-analyzer": "^2.13.1",
-    "webpack-cli": "^2.1.4",
-    "@angular-devkit/build-angular": "~0.6.6"
+    "webpack-cli": "^2.1.4"
   }
 }
diff --git a/webpack.config.vendor.js b/webpack.config.vendor.js
index dd198b09..6b67e525 100644
--- a/webpack.config.vendor.js
+++ b/webpack.config.vendor.js
@@ -30,6 +30,12 @@ const allModules = treeShakableModules.concat(nonTreeShakableModules);
 
 module.exports = (env) => {
   console.log(`env = ${JSON.stringify(env)}`)
+  const extractCSS = new MiniCssExtractPlugin({
+    // Options similar to the same options in webpackOptions.output
+    // both options are optional
+    filename: "[name].css",
+    chunkFilename: "[id].css"
+  });
   const isDevBuild = !(env && env.prod);
   const sharedConfig = {
     mode: isDevBuild ? "development" : "production",
@@ -70,7 +76,10 @@ module.exports = (env) => {
     module: {
       rules: [{
         test: /\.css(\?|$)/,
-        use: ['style-loader', MiniCssExtractPlugin.loader, isDevBuild ? 'css-loader' : 'css-loader?minimize']
+        use: [
+          MiniCssExtractPlugin.loader,
+          isDevBuild ? 'css-loader' : 'css-loader?minimize'
+        ]
       }]
     },
     plugins: [
@@ -118,7 +127,10 @@ module.exports = (env) => {
     module: {
       rules: [{
         test: /\.css(\?|$)/,
-        use: ['to-string-loader', isDevBuild ? 'css-loader' : 'css-loader?minimize']
+        use: [
+          MiniCssExtractPlugin.loader,
+          isDevBuild ? 'css-loader' : 'css-loader?minimize'
+        ]
       }]
     },
     plugins: [