diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index 0a94c39bd2d..0febe746e1a 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -35,7 +35,7 @@
     "bfj": "6.1.1",
     "case-sensitive-paths-webpack-plugin": "2.1.2",
     "chalk": "2.4.2",
-    "css-loader": "1.0.0",
+    "css-loader": "5.0.0",
     "dotenv": "6.0.0",
     "dotenv-expand": "4.2.0",
     "eslint": "5.12.0",
@@ -56,10 +56,10 @@
     "mini-css-extract-plugin": "0.4.3",
     "optimize-css-assets-webpack-plugin": "5.0.1",
     "pnp-webpack-plugin": "1.2.1",
-    "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": "6.5.0",
-    "postcss-safe-parser": "4.0.1",
+    "postcss-safe-parser": "5.0.0",
     "react-app-polyfill": "^0.2.0",
     "react-dev-utils": "^7.0.1",
     "resolve": "1.9.0",