diff --git a/package.json b/package.json
index 5af2d91..abce4d2 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "url": "https://github.com/overlookmotel/spy-module/issues"
   },
   "dependencies": {
-    "sinon": "^6.1.3"
+    "sinon": "^9.0.1"
   },
   "devDependencies": {
     "chai": "^4.1.2",