diff --git a/packages/google-cloud-texttospeech/package.json b/packages/google-cloud-texttospeech/package.json
index 928aea24c64..5a659136978 100644
--- a/packages/google-cloud-texttospeech/package.json
+++ b/packages/google-cloud-texttospeech/package.json
@@ -63,7 +63,7 @@
     "jsdoc-region-tag": "^3.0.0",
     "linkinator": "4.1.2",
     "long": "^5.2.3",
-    "mocha": "^9.2.2",
+    "mocha": "^10.6.0",
     "pack-n-play": "^2.0.0",
     "sinon": "^17.0.0",
     "typescript": "^5.1.6"