diff --git a/package.json b/package.json
index cc6e4a0..bbc551b 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "neostandard": "^0.13.0",
     "proxyquire": "^2.1.3",
     "semver": "^7.6.0",
-    "sinon": "^18.0.0",
+    "sinon": "^21.0.3",
     "tsd": "^0.33.0"
   },
   "publishConfig": {