diff --git a/package.json b/package.json
index 2b02006..92b305d 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "rollup-plugin-node-globals": "^1.4.0",
     "rollup-plugin-node-resolve": "^5.0.4",
     "rollup-plugin-terser": "^5.0.0",
-    "sinon": "^8.0.1",
+    "sinon": "^9.0.0",
     "unexpected-sinon": "^10.11.0"
   },
   "scripts": {