diff --git a/package.json b/package.json
index bdfbb1f..ca67a44 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "devDependencies": {
     "@types/chai": "^4.0.5",
     "@types/connect": "^3.4.32",
-    "@types/mocha": "^8.0.0",
+    "@types/mocha": "^9.0.0",
     "@types/node": "^14.0.1",
     "@types/sinon": "9.0.9",
     "chai": "^4.1.2",