diff --git a/README.md b/README.md
index dd54ada..41a9ea7 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ npm install reader-stat --save
 
 ## Usage
 
+### readdir
+
 ```js
 const { readdir } = require('reader-stat');
 
@@ -22,14 +24,7 @@ readdir('/').then((files) => {
     // output =>
     // Stats {
     //   dev: 16777220,
-    //   mode: {
-    //     number: 16877,
-    //     string: 'drwxr-xr-x',
-    //     isSymbolicLink: true,
-    //     owner: { read: true, write: true, execute: true },
-    //     group: { read: true, write: false, execute: true },
-    //     others: { read: true, write: false, execute: true }
-    //   },
+    //   mode: 41453,
     //   nlink: 26,
     //   uid: 0,
     //   gid: 0,
@@ -46,15 +41,25 @@ readdir('/').then((files) => {
     //   mtime: 2017-09-26T05:32:50.874Z,
     //   ctime: 2017-09-26T05:32:50.874Z,
     //   birthtime: 2017-09-26T05:08:14.000Z,
-    //   uidToName: 'root',
-    //   path: '/var',
-    //   basename: 'var',
-    //   extname: ''
+    //   extend: { 
+    //     number: 41453,
+    //     isSymbolicLink: true,
+    //     string: 'lrwxr-xr-x',
+    //     owner: { read: true, write: true, execute: true },
+    //     group: { read: true, write: false, execute: true },
+    //     others: { read: true, write: false, execute: true },
+    //     uidToName: 'root',
+    //     path: '/var',
+    //     basename: 'var',
+    //     extname: ''
+    //   }
     // }  
   });
 })
 ```
 
+### getStat
+
 Read a single directory or file the [stat](http://nodejs.cn/api/fs.html#fs_class_fs_stats) info.
 
 ```js
@@ -67,14 +72,7 @@ getStat('/var').then((Stats) => {
   // output =>
   // Stats {
   //   dev: 16777220,
-  //   mode: {
-  //     number: 16877,
-  //     string: 'drwxr-xr-x',
-  //     isSymbolicLink: true,
-  //     owner: { read: true, write: true, execute: true },
-  //     group: { read: true, write: false, execute: true },
-  //     others: { read: true, write: false, execute: true }
-  //   },
+  //   mode: 41453,
   //   nlink: 26,
   //   uid: 0,
   //   gid: 0,
@@ -91,14 +89,24 @@ getStat('/var').then((Stats) => {
   //   mtime: 2017-09-26T05:32:50.874Z,
   //   ctime: 2017-09-26T05:32:50.874Z,
   //   birthtime: 2017-09-26T05:08:14.000Z,
-  //   uidToName: 'root',
-  //   path: '/var',
-  //   basename: 'var',
-  //   extname: ''
+  //   extend: { 
+  //     number: 41453,
+  //     isSymbolicLink: true,
+  //     string: 'lrwxr-xr-x',
+  //     owner: { read: true, write: true, execute: true },
+  //     group: { read: true, write: false, execute: true },
+  //     others: { read: true, write: false, execute: true },
+  //     uidToName: 'root',
+  //     path: '/var',
+  //     basename: 'var',
+  //     extname: ''
+  //   }
   // }
 })
 ```
 
+### readdirAsync
+
 Get all the file names in the directory.
 
 ```js
@@ -122,6 +130,8 @@ readdirAsync('/var').then((Stats) => {
 })
 ```
 
+### uidToName
+
 ```js
 const { uidToName } = require('reader-stat');
 
@@ -148,6 +158,59 @@ uidToName(0).then((User) => {
 })
 ```
 
+### chmod
+
+```js
+const { chmod } = require('reader-stat');
+const file = path.join(__dirname, 'test.sh');
+
+chmod(file, 777);
+```
+
+Or you can use object instead of number, see [stat-mode](https://github.com/TooTallNate/stat-mode)
+
+```js
+chmod(file, {
+  owner: {
+    read: true,
+    write: true,
+    execute: true
+  },
+  group: {
+    read: true,
+    write: true,
+    execute: true
+  },
+  others: {
+    read: true,
+    write: true,
+    execute: true
+  }
+});
+```
+
+You can also write a object Simply when the same for each
+
+```js
+chmod(file, {
+  read: true
+});
+
+// equals
+
+chmod(file, {
+  owner: {
+    read: true
+  },
+  group: {
+    read: true
+  },
+  others: {
+    read: true
+  }
+});
+```
+
 ## License
 
 MIT licensed
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