diff --git a/package.json b/package.json
index 1928439..68e390f 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "chai": "^4.2.0",
     "coveralls": "^3.1.0",
     "istanbul": "^0.4.5",
-    "mocha": "^8.0.1",
+    "mocha": "^9.0.0",
     "sinon": "^9.0.2"
   },
   "bugs": {