diff --git a/package.json b/package.json
index 97d6df0..b05988c 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "espower-loader": "^1.0.0",
     "intelli-espower-loader": "^1.0.0",
     "minecraft-wrap": "^1.0.0",
-    "mocha": "^3.0.2",
+    "mocha": "^4.0.0",
     "power-assert": "^1.0.0",
     "require-self": "^0.2.1"
   },