diff --git a/package.json b/package.json
index e8819a8..498dedf 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "istanbul": "^0.4.2",
     "mocha": "^5.0.0",
     "proxyquire": "^2.0.0",
-    "sinon": "^4.0.1",
+    "sinon": "^5.0.5",
     "sinon-chai": "^3.0.0",
     "standard": "^11.0.0"
   },