diff --git a/package.json b/package.json
index 62db792..00bf023 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "globals": "^16.0.0",
     "husky": "^9.1.7",
     "mocha": "^11.0.0",
-    "sinon": "^20.0.0",
+    "sinon": "^21.0.0",
     "tsx": "^4.19.2",
     "typescript": "^5.7.2",
     "typescript-eslint": "^8.15.0"