diff --git a/package.json b/package.json
index 3237c1c..522a2ad 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,6 @@
     "babel-preset-es2015-node4": "^2.1.0",
     "expect.js": "^0.3.1",
     "mocha": "^3.1.2",
-    "sinon": "^1.17.2"
+    "sinon": "^2.0.0"
   }
 }