diff --git a/packages/react-scripts/package.json b/packages/react-scripts/package.json
index ac6dc41f3a3..86f915ddf12 100644
--- a/packages/react-scripts/package.json
+++ b/packages/react-scripts/package.json
@@ -49,7 +49,7 @@
     "fs-extra": "0.30.0",
     "gzip-size": "3.0.0",
     "html-webpack-plugin": "2.24.0",
-    "http-proxy-middleware": "0.17.2",
+    "http-proxy-middleware": "0.20.0",
     "jest": "17.0.2",
     "json-loader": "0.5.4",
     "object-assign": "4.1.0",
@@ -62,7 +62,7 @@
     "style-loader": "0.13.1",
     "url-loader": "0.5.7",
     "webpack": "1.14.0",
-    "webpack-dev-server": "1.16.2",
+    "webpack-dev-server": "4.0.0",
     "webpack-manifest-plugin": "1.1.0",
     "whatwg-fetch": "1.0.0"
   },