diff --git a/packages/docusaurus/package.json b/packages/docusaurus/package.json
index c67e521b2e0d..f5f8d38c2760 100644
--- a/packages/docusaurus/package.json
+++ b/packages/docusaurus/package.json
@@ -60,7 +60,7 @@
     "commander": "^4.0.1",
     "copy-webpack-plugin": "^6.0.3",
     "core-js": "^2.6.5",
-    "css-loader": "^3.4.2",
+    "css-loader": "^5.0.0",
     "del": "^5.1.0",
     "detect-port": "^1.3.0",
     "eta": "^1.1.1",
@@ -85,7 +85,7 @@
     "null-loader": "^3.0.0",
     "optimize-css-assets-webpack-plugin": "^5.0.3",
     "pnp-webpack-plugin": "^1.6.4",
-    "postcss-loader": "^3.0.0",
+    "postcss-loader": "^4.0.0",
     "postcss-preset-env": "^6.7.0",
     "react-dev-utils": "^10.2.1",
     "react-helmet": "^6.0.0-beta",