diff --git a/package.json b/package.json
index b13998d..cc07c69 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "coveralls": "^3.0.7",
     "eslint": "^10.5.0",
     "eslint-config-google": "^0.14.0",
-    "mocha": "^11.7.6",
+    "mocha": "^12.0.0",
     "nyc": "^18.0.0",
     "ot-json1": "^1.0.1",
     "rich-text": "^4.1.0",