diff --git a/package.json b/package.json
index 6ee1cec..47ef43c 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "jshint": "^2.9.5",
     "mocha": "~5.2.0",
     "nock": "~10.0.0",
-    "sinon": "~6.0.1",
+    "sinon": "~9.0.2",
     "testen": "^2.2.1"
   },
   "dependencies": {