diff --git a/package.json b/package.json
index 5af452b..dae47f7 100644
--- a/package.json
+++ b/package.json
@@ -64,7 +64,7 @@
     "nyc": "^10.0.0",
     "postcss": "^5.2.9",
     "postcss-modules": "^0.6.2",
-    "sinon": "^1.17.7",
+    "sinon": "^2.1.0",
     "sinon-chai": "^2.8.0",
     "string-hash": "^1.1.1"
   },