diff --git a/package.json b/package.json
index 8662abf..4ce61be 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "@gamestdio/clock": "^1.1.9"
   },
   "devDependencies": {
-    "@types/mocha": "^2.2.41",
+    "@types/mocha": "^5.2.7",
     "assert": "^1.3.0",
     "mocha": "^6.0.2",
     "rimraf": "^2.5.2",