diff --git a/lib/core/package.json b/lib/core/package.json
index 48571bbd70e0..8d751d203210 100644
--- a/lib/core/package.json
+++ b/lib/core/package.json
@@ -22,19 +22,19 @@
     "@storybook/client-logger": "3.4.0-rc.2",
     "@storybook/node-logger": "3.4.0-rc.2",
     "@storybook/ui": "3.4.0-rc.2",
-    "autoprefixer": "^7.2.6",
+    "autoprefixer": "^10.0.0",
     "babel-runtime": "^6.26.0",
     "chalk": "^2.3.2",
     "commander": "^2.15.0",
-    "css-loader": "^0.28.10",
+    "css-loader": "^5.0.0",
     "dotenv": "^5.0.1",
     "events": "^2.0.0",
     "express": "^4.16.3",
     "file-loader": "^1.1.11",
     "global": "^4.3.2",
     "json-loader": "^0.5.7",
-    "postcss-flexbugs-fixes": "^3.2.0",
-    "postcss-loader": "^2.1.1",
+    "postcss-flexbugs-fixes": "^5.0.0",
+    "postcss-loader": "^4.0.0",
     "prop-types": "^15.6.1",
     "qs": "^6.5.1",
     "react": "^16.0.0",