diff --git a/package.json b/package.json
index aac8e2c..a4ec192 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "yosay": "^2.0.0"
   },
   "devDependencies": {
-    "mocha": "^3.1.2"
+    "mocha": "^4.0.0"
   },
   "license": "MIT",
   "repository": {