diff --git a/package.json b/package.json
index 1e0b2ae..049f500 100644
--- a/package.json
+++ b/package.json
@@ -13,11 +13,11 @@
     "chai": "^4.1.2",
     "eslint": "^4.12.1",
     "eslint-config-spreetail": "^3.0.0",
-    "karma": "^3.0.0",
+    "karma": "^4.2.0",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-mocha": "^1.3.0",
-    "karma-rollup-preprocessor": "^5.0.2",
+    "karma-rollup-preprocessor": "^7.0.1",
     "knockout": "^3.5.1",
     "mocha": "^4.0.1",
     "puppeteer": "^3.0.2",