diff --git a/package.json b/package.json
index 92a968f29..a28ed280f 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
   "devDependencies": {
     "expect": "^1.20.1",
     "jsdom": "^9.2.1",
-    "mocha": "^2.5.3",
+    "mocha": "^9.0.3",
     "mocha-jsdom": "^1.1.0",
     "mocha-multi": "^0.9.0"
   }