diff --git a/package.json b/package.json
index ebe26ff..085a259 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "enju",
-  "version": "5.1.0",
+  "version": "5.1.1",
   "description": "An elasticsearch client on node.js written in CoffeeScript.",
   "main": "index.js",
   "scripts": {