diff --git a/packages/react-scripts/config/webpack.config.js b/packages/react-scripts/config/webpack.config.js
index eddca1b070766c5c4e0a0ff6c18e72d2aeba8a28..2ea713ff6d616753397f1589b828dddc82e172f6 100644
--- a/packages/react-scripts/config/webpack.config.js
+++ b/packages/react-scripts/config/webpack.config.js
@@ -134,7 +134,7 @@ module.exports = function (webpackEnv) {
               autoprefixer: {
                 flexbox: 'no-2009',
               },
-              stage: 3,
+              stage: 4,
             }),
             // Adds PostCSS Normalize as the reset css with default options,
             // so that it honors browserslist config in package.json