diff --git a/package.json b/package.json
index 6f6f47f..44345b3 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "cross-env": "^5.2.0",
     "istanbul": "^0.4.5",
     "jshint": "^2.9.5",
-    "mocha": "^5.2.0"
+    "mocha": "^6.2.2"
   },
   "keywords": [
     "coroutine",