diff --git a/package.json b/package.json
index 84decb1..47ef142 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "eslint-plugin-should-promised": "^2.0.0",
     "mocha": "^5.2.0",
     "nyc": "^12.0.2",
-    "sinon": "^6.1.5",
+    "sinon": "^9.0.0",
     "sinon-chai": "^3.2.0"
   }
 }