diff --git a/package.json b/package.json
index 6866af4..b85d5d2 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "istanbul": "^0.4.5",
     "jsdoc": "^3.4.3",
     "jsdom": "^11.1.0",
-    "sinon": "^4.0.0",
+    "sinon": "^5.0.0",
     "mocha": "^4.0.0",
     "webpack": "^3.0.0"
   }