diff --git a/History.md b/History.md
index 40bbcb5..679f79b 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,9 @@
 
+2.4.0 / 2016-06-07
+==================
+
+  * feat: add queryOne api (#9)
+
 2.3.1 / 2016-06-02
 ==================
 
diff --git a/package.json b/package.json
index 39725b3..c21aee3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ali-rds",
-  "version": "2.3.1",
+  "version": "2.4.0",
   "description": "Aliyun RDS client",
   "main": "lib/client.js",
   "files": [