diff --git a/package.json b/package.json
index 11bd8ba..623fab6 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "coveralls": "^2.11.9",
     "istanbul": "^0.4.3",
     "mocha": "^3.0.0",
-    "sinon": "^1.17.6",
+    "sinon": "^2.3.8",
     "sinon-chai": "^2.8.0"
   },
   "repository": {