diff --git a/package.json b/package.json
index d33c6ba..29e8a6d 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "eslint-plugin-standard": "2.1.0",
     "nock": "9.0.14",
     "nyc": "11.2.0",
-    "sinon": "3.2.1",
+    "sinon": "4.1.4",
     "supertest": "3.0.0"
   },
   "ava": {