diff --git a/package.json b/package.json
index f14f596..9a2c045 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,7 @@
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-sauce-launcher": "^1.2.0",
     "karma-sourcemap-loader": "^0.3.7",
-    "karma-webpack": "^3.0.5",
+    "karma-webpack": "^4.0.2",
     "mocha": "^5.2.0",
     "nyc": "^13.1.0",
     "phantomjs-prebuilt": "^2.1.16",