diff --git a/package.json b/package.json
index 012106f..6f40359 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "mocha": "^5.0.0",
     "mock-require": "^3.0.0",
     "nyc": "^11.4.0",
-    "sinon": "^4.1.3",
+    "sinon": "^5.0.10",
     "sinon-chai": "^3.0.0"
   },
   "nyc": {