diff --git a/tests/package.json b/tests/package.json
index 622f80b..3c4d7d7 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -5,7 +5,7 @@
   "dependencies": {
     "webpack": "4.28.3",
     "webpack-cli": "3.2.1",
-    "webpack-dev-server": "3.1.14"
+    "webpack-dev-server": "4.0.0"
   },
   "scripts": {
     "test": "webpack --mode production"