diff --git a/package.json b/package.json
index 49fbf54..65b3c50 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   "devDependencies": {
     "chai": "4.1.2",
     "koa": "2.5.1",
-    "mocha": "2.5.3",
+    "mocha": "5.2.0",
     "supertest": "3.1.0"
   }
 }