diff --git a/package.json b/package.json
index f97aa9e5..6f58f501 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
   "license": "ISC",
   "devDependencies": {
     "@types/chai": "^4.2.11",
-    "@types/mocha": "^8.0.0",
+    "@types/mocha": "^9.0.0",
     "@types/node": "^14.0.0",
     "@typescript-eslint/eslint-plugin": "^3.10.1",
     "@typescript-eslint/parser": "^3.10.1",