diff --git a/node_modules/diff/package.json b/node_modules/diff/package.json
index 4ff484e883..0001e8d968 100644
--- a/node_modules/diff/package.json
+++ b/node_modules/diff/package.json
@@ -67,7 +67,7 @@
     "rollup-plugin-babel": "^4.2.0",
     "semver": "^5.6.0",
     "webpack": "^4.28.3",
-    "webpack-dev-server": "^3.1.14"
+    "webpack-dev-server": "^4.0.0"
   },
   "optionalDependencies": {}
 }
\ No newline at end of file