diff --git a/packages/winnow/package.json b/packages/winnow/package.json
index 9acde9db..48cd8629 100644
--- a/packages/winnow/package.json
+++ b/packages/winnow/package.json
@@ -73,7 +73,7 @@
     "benchmark": "^2.1.4",
     "fs-extra": "^11.2.0",
     "proxyquire": "^2.1.3",
-    "sinon": "^18.0.0",
+    "sinon": "^20.0.0",
     "tap-min": "^3.0.0",
     "tape": "^5.9.0"
   },