diff --git a/lib/core/package.json b/lib/core/package.json
index 2591f8814bfc..5079a8178fb8 100644
--- a/lib/core/package.json
+++ b/lib/core/package.json
@@ -36,7 +36,7 @@
     "@storybook/ui": "5.2.0-beta.18",
     "airbnb-js-shims": "^1 || ^2",
     "ansi-to-html": "^0.6.11",
-    "autoprefixer": "^9.4.9",
+    "autoprefixer": "^10.0.0",
     "babel-plugin-add-react-displayname": "^0.0.5",
     "babel-plugin-emotion": "^10.0.14",
     "babel-plugin-macros": "^2.4.5",
@@ -49,7 +49,7 @@
     "common-tags": "^1.8.0",
     "core-js": "^3.0.1",
     "corejs-upgrade-webpack-plugin": "^2.2.0",
-    "css-loader": "^3.0.0",
+    "css-loader": "^5.0.0",
     "detect-port": "^1.3.0",
     "dotenv-webpack": "^1.7.0",
     "ejs": "^2.6.1",
@@ -68,8 +68,8 @@
     "node-fetch": "^2.6.0",
     "open": "^6.1.0",
     "pnp-webpack-plugin": "1.4.3",
-    "postcss-flexbugs-fixes": "^4.1.0",
-    "postcss-loader": "^3.0.0",
+    "postcss-flexbugs-fixes": "^5.0.0",
+    "postcss-loader": "^4.0.0",
     "pretty-hrtime": "^1.0.3",
     "qs": "^6.6.0",
     "raw-loader": "^2.0.0",