diff --git a/package.json b/package.json
index 7ce39de..d6d2bfb 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,6 @@
   },
   "devDependencies": {
     "chai": "~1.9.0",
-    "mocha": "~1.17.1"
+    "mocha": "~9.0.2"
   }
 }