diff --git a/package.json b/package.json
index dd6ccc9..d42f965 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "author": "Yamagishi Kazutoshi",
   "name": "w3c-xmlhttprequest",
   "description": "Server-side XMLHttpRequest.",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "license": "MIT",
   "homepage": "https://github.com/ykzts/node-xmlhttprequest",
   "repository": {