diff --git a/package.json b/package.json
index 0e4df5a..99b108a 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,6 @@
     "istanbul": "^0.4.0",
     "jscs": "^2.5.1",
     "jscs-preset-hexo": "^1.0.1",
-    "mocha": "^2.3.3"
+    "mocha": "^5.2.0"
   }
 }