diff --git a/package.json b/package.json
index 19ad6d6..86df833 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "mocha-lcov-reporter": "^1.2.0",
     "myth": "1.5.0",
     "node-sass": "^3.8.0",
-    "sinon": "1.17.4",
+    "sinon": "2.0.0",
     "stylus": "0.54.5",
     "swig": "1.4.2",
     "unexpected": "^10.13.3",