diff --git a/package.json b/package.json
index 5f59666..a3d5bb6 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "node": ">=6"
   },
   "devDependencies": {
-    "@stryker-mutator/core": "^4.3.1",
+    "@stryker-mutator/core": "^5.3.0",
     "@stryker-mutator/mocha-runner": "^4.3.1",
     "chai": "^4.1.0",
     "coveralls": "^3.0.0",