diff --git a/package.json b/package.json
index 3454bec..37737cb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "smpp",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "SMPP client and server implementation in node.js",
   "author": "Ali Farhadi <a.farhadi@gmail.com>",
   "engines": {