diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index 54b3a6611..0d0e57115 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -77,7 +77,7 @@
     "postcss-flexbugs-fixes": "4.1.0",
     "postcss-import": "12.0.1",
     "postcss-loader": "3.0.0",
-    "postcss-preset-env": "6.4.0",
+    "postcss-preset-env": "6.5.0",
     "postcss-safe-parser": "4.0.1",
     "prettier": "1.15.3",
     "react-app-polyfill": "^0.1.3",