diff --git a/config/webpack.config.dev.js b/config/webpack.config.dev.js
index 9b1f4182226..13fe5cafc24 100644
--- a/config/webpack.config.dev.js
+++ b/config/webpack.config.dev.js
@@ -60,7 +60,7 @@ const getStyleLoaders = (cssOptions, preProcessor) => {
             autoprefixer: {
               flexbox: 'no-2009',
             },
-            stage: 4,
+            stage: 3,
           }),
         ],
       },
diff --git a/config/webpack.config.prod.js b/config/webpack.config.prod.js
index 9ce5eb80194..af250048d14 100644
--- a/config/webpack.config.prod.js
+++ b/config/webpack.config.prod.js
@@ -72,7 +72,7 @@ const getStyleLoaders = (cssOptions, preProcessor) => {
             autoprefixer: {
               flexbox: 'no-2009',
             },
-            stage: 4,
+            stage: 3,
           }),
         ],
         sourceMap: shouldUseSourceMap,