diff --git a/package.json b/package.json
index b40a018..798729e 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   "devDependencies": {
     "expect.js": "^0.3.1",
     "jshint": "^2.8.0",
-    "mocha": "^4.0.1"
+    "mocha": "^6.1.0"
   },
   "optionalDependencies": {},
   "bugs": {