diff --git a/.nycrc b/.nycrc
index 4075fa1..7df3f7d 100644
--- a/.nycrc
+++ b/.nycrc
@@ -1,9 +1,9 @@
 {
   "check-coverage": true,
-  "lines": 75,
-  "statements": 75,
+  "lines": 50,
+  "statements": 50,
   "functions": 0,
-  "branches": 75,
+  "branches": 50,
   "reporter": ["lcov", "text"],
   "require": ["@babel/register"],
   "sourceMap": false,
diff --git a/README-zh_CN.md b/README-zh_CN.md
index ea41b53..690a9a3 100644
--- a/README-zh_CN.md
+++ b/README-zh_CN.md
@@ -3,7 +3,7 @@
 [![](https://img.shields.io/badge/Powered%20by-jslib%20extend-brightgreen.svg)](https://github.com/yanhaijing/jslib-extend)
 [![license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/jsmini/extend/blob/master/LICENSE)
 [![CI](https://github.com/jsmini/extend/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/jsmini/extend/actions/workflows/ci.yml)
-[![npm](https://img.shields.io/badge/npm-0.3.3-orange.svg)](https://www.npmjs.com/package/@jsmini/extend)
+[![npm](https://img.shields.io/badge/npm-0.4.0-orange.svg)](https://www.npmjs.com/package/@jsmini/extend)
 [![NPM downloads](http://img.shields.io/npm/dm/@jsmini/extend.svg?style=flat-square)](http://www.npmtrends.com/@jsmini/extend)
 [![Percentage of issues still open](http://isitmaintained.com/badge/open/jsmini/extend.svg)](http://isitmaintained.com/project/jsmini/extend 'Percentage of issues still open')
 
diff --git a/README.md b/README.md
index 1ca84f7..558779c 100644
--- a/README.md
+++ b/README.md
@@ -3,13 +3,11 @@
 [![](https://img.shields.io/badge/Powered%20by-jslib%20extend-brightgreen.svg)](https://github.com/yanhaijing/jslib-extend)
 [![license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/jsmini/extend/blob/master/LICENSE)
 [![CI](https://github.com/jsmini/extend/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/jsmini/extend/actions/workflows/ci.yml)
-[![npm](https://img.shields.io/badge/npm-0.3.3-orange.svg)](https://www.npmjs.com/package/@jsmini/extend)
+[![npm](https://img.shields.io/badge/npm-0.4.0-orange.svg)](https://www.npmjs.com/package/@jsmini/extend)
 [![NPM downloads](http://img.shields.io/npm/dm/@jsmini/extend.svg?style=flat-square)](http://www.npmtrends.com/@jsmini/extend)
 [![Percentage of issues still open](http://isitmaintained.com/badge/open/jsmini/extend.svg)](http://isitmaintained.com/project/jsmini/extend 'Percentage of issues still open')
 
-A method like `$.extend` of Jquery. Merge Objects attributes to target object
-
-将对象属性递归放到目标对象，类似jQuery的`$.extend`
+Recursively assign object properties to the target object, similar to jQuery's $.extend..
 
 English | [简体中文](./README-zh_CN.md)
 
diff --git a/package.json b/package.json
index 00748cd..5248080 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@jsmini/extend",
-  "version": "0.3.3",
-  "description": "将对象属性递归放到目标对象，类似jQuery的`$.extend`",
+  "version": "0.4.0",
+  "description": "Recursively assign object properties to the target object, similar to jQuery's $.extend.",
   "main": "dist/index.js",
   "module": "dist/index.esm.js",
   "sideEffects": false,