diff --git a/package.json b/package.json
index 4ab9b69..a929667 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,6 @@
     "jsdoc": "^3.4.3",
     "mocha": "^5.0.0",
     "sinon": "^5.0.0",
-    "webpack": "^3.0.0"
+    "webpack": "^4.9.1"
   }
 }