diff --git a/package.json b/package.json
index ed07c31..64f2eff 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     }
   ],
   "devDependencies": {
-    "mocha": "^3.0.2"
+    "mocha": "^4.0.0"
   },
   "dependencies": {
     "colors": "^1.1.2",