diff --git a/package.json b/package.json
index 946ca77..025bff5 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "istanbul": "^0.4.0",
     "mocha": "3.5.3",
     "shelljs": "^0.7.6",
-    "sinon": "^4.0.1"
+    "sinon": "^5.0.1"
   },
   "peerDependencies": {
     "express": "^4.12.0"