diff --git a/package.json b/package.json
index 054180c..bbc4796 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "eslint-plugin-import": "^2.8.0",
     "mocha": "^5.0.0",
     "nyc": "^11.4.1",
-    "sinon": "^4.0.0"
+    "sinon": "^5.0.0"
   },
   "scripts": {
     "build": "babel src -d dist",