diff --git a/package.json b/package.json
index 9e45967..6d296ac 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "eslint-config-okonet": "^1.2.3",
     "jsdom": "^9.11.0",
     "lint-staged": "^4.0.0",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "npm-check": "^5.2.2",
     "npmpub": "^3.1.0",
     "pre-commit": "^1.1.2",