diff --git a/src/Bundle/ChillMainBundle/chill.webpack.config.js b/src/Bundle/ChillMainBundle/chill.webpack.config.js
index 0e4924b03..727964779 100644
--- a/src/Bundle/ChillMainBundle/chill.webpack.config.js
+++ b/src/Bundle/ChillMainBundle/chill.webpack.config.js
@@ -26,12 +26,15 @@ buildCKEditor = function(encore)
         .addLoader({
             test: /ckeditor5-[^/\\]+[/\\]theme[/\\].+\.css$/,
             loader: 'postcss-loader',
-            options: styles.getPostCssConfig( {
-                themeImporter: {
+            options:
+              {
+                postcssOptions: styles.getPostCssConfig( {
+                  themeImporter: {
                     themePath: require.resolve('@ckeditor/ckeditor5-theme-lark')
-                },
-                minify: true
-            } )
+                  },
+                  minify: true
+                } )
+              }
         } )
     ;
 };