diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index 7170e4ff98b..d26dd84cc3f 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -49,10 +49,10 @@
     "jest": "23.6.0",
     "mini-css-extract-plugin": "0.4.3",
     "optimize-css-assets-webpack-plugin": "5.0.1",
-    "postcss-flexbugs-fixes": "4.1.0",
-    "postcss-loader": "3.0.0",
+    "postcss-flexbugs-fixes": "5.0.0",
+    "postcss-loader": "4.0.0",
     "postcss-preset-env": "6.0.6",
-    "postcss-safe-parser": "4.0.1",
+    "postcss-safe-parser": "5.0.0",
     "react-app-polyfill": "^0.1.1",
     "react-dev-utils": "^6.0.1",
     "resolve": "1.8.1",