diff --git a/package.json b/package.json
index 64ffd4b..3481b2a 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "memory-fs": "^0.4.1",
     "mocha": "^3.2.0",
     "nyc": "^11.0.2",
-    "webpack": "^3.1.0"
+    "webpack": "^4.9.0"
   },
   "dependencies": {
     "persistgraphql": "^0.3.5",