diff --git a/package.json b/package.json
index c4a8b73..dff0703 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "devDependencies": {
     "chai": "^3.5.0",
     "istanbul": "^0.4.3",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "graphql": ">=0.5.0"
   },
   "dependencies": {