diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index 05d784169f5..dfef220b781 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -58,7 +58,7 @@
     "pnp-webpack-plugin": "1.1.0",
     "postcss-flexbugs-fixes": "4.1.0",
     "postcss-loader": "3.0.0",
-    "postcss-preset-env": "6.0.6",
+    "postcss-preset-env": "6.3.1",
     "postcss-safe-parser": "4.0.1",
     "react-app-polyfill": "^0.1.3",
     "react-dev-utils": "^6.1.1",