diff --git a/package.json b/package.json
index fbd2a6c4d..5dadf968b 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
 		"@types/mocha": "10.0.10",
 		"@types/node": "24.10.1",
 		"@types/semver": "7.7.1",
-		"@types/sinon": "20.0.0",
+		"@types/sinon": "21.0.0",
 		"@types/trusted-types": "2.0.7",
 		"@types/wicg-file-system-access": "2023.10.7",
 		"@types/winreg": "1.2.36",