diff --git a/packages/google-cloud-tpu/package.json b/packages/google-cloud-tpu/package.json
index 8be6f231e4a..2c89b054617 100644
--- a/packages/google-cloud-tpu/package.json
+++ b/packages/google-cloud-tpu/package.json
@@ -42,7 +42,7 @@
     "google-gax": "^2.24.1"
   },
   "devDependencies": {
-    "@types/mocha": "^8.2.2",
+    "@types/mocha": "^9.0.0",
     "@types/node": "^16.0.0",
     "@types/sinon": "^10.0.0",
     "c8": "^7.7.2",