diff --git a/package.json b/package.json
index 7d3a9b0..03a4c40 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,6 @@
   },
   "devDependencies": {
     "chai": "^2.2.0",
-    "mocha": "~1.20.1"
+    "mocha": "~6.2.1"
   }
 }