diff --git a/package.json b/package.json
index 7f2b49b..4543f65 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "rollup": "0.38.1",
     "rollup-plugin-babel": "2.7.1",
     "sinon": "1.17.7",
-    "sinon-chai": "2.8.0",
+    "sinon-chai": "2.9.0",
     "webpack": "1.14.0"
   }
 }