diff --git a/package.json b/package.json
index b526d4c..f51d933 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "devDependencies": {
     "chai": "^4.1.1",
     "eslint": "^4.4.1",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "sinon": "^1.17.4",
     "supertest": "^3.0.0"
   },