diff --git a/examples/preact/package.json b/examples/preact/package.json
index c88aea592bb1f3..d8cd33823fd4b0 100644
--- a/examples/preact/package.json
+++ b/examples/preact/package.json
@@ -16,7 +16,7 @@
     "babel-preset-react-app": "^7.0.2",
     "bfj": "6.1.1",
     "case-sensitive-paths-webpack-plugin": "2.2.0",
-    "css-loader": "1.0.0",
+    "css-loader": "5.0.0",
     "dotenv": "6.0.0",
     "dotenv-expand": "4.2.0",
     "eslint": "5.12.0",
@@ -37,10 +37,10 @@
     "mini-css-extract-plugin": "0.5.0",
     "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",
     "preact": "^10.0.0-beta.0",
     "react": "^16.8.6",
     "react-app-polyfill": "^0.2.2",