diff --git a/README.md b/README.md
index 0ecc3d81..e5b4fb6b 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ Please follow the guide doc to install the SDK on different platforms.
   * en: [![](https://img.shields.io/badge/Download-PDF-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK/files/2764152/mynt-eye-s-sdk-apidoc-2.3.0-en.pdf) [![](https://img.shields.io/badge/Download-HTML-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK/files/2764156/mynt-eye-s-sdk-apidoc-2.3.0-en.zip) [![](https://img.shields.io/badge/Online-HTML-blue.svg?style=flat)](https://slightech.github.io/MYNT-EYE-S-SDK/)
   * zh-Hans: [![](https://img.shields.io/badge/Download-PDF-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK/files/2764160/mynt-eye-s-sdk-apidoc-2.3.0-zh-Hans.pdf) [![](https://img.shields.io/badge/Download-HTML-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK/files/2764173/mynt-eye-s-sdk-apidoc-2.3.0-en.zip) [![](https://img.shields.io/badge/Online-HTML-blue.svg?style=flat)](http://doc.myntai.com/resource/api/mynt-eye-s-sdk-apidoc-2.3.0-zh-Hans/mynt-eye-s-sdk-apidoc-2.3.0-zh-Hans/index.html)
 * [Guide Doc](https://github.com/slightech/MYNT-EYE-S-SDK-Guide/releases): How to install and start using the SDK.
-  * en: [![](https://img.shields.io/badge/Download-PDF-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK-Guide/files/2764143/mynt-eye-s-sdk-guide-2.3.0-en.pdf) [![](https://img.shields.io/badge/Download-HTML-blue.svg?style=flat)]((https://github.com/slightech/MYNT-EYE-S-SDK-Guide/files/2764145/mynt-eye-s-sdk-guide-2.3.0-en.zip) [![](https://img.shields.io/badge/Online-HTML-blue.svg?style=flat)](https://slightech.github.io/MYNT-EYE-S-SDK-Guide/)
+  * en: [![](https://img.shields.io/badge/Download-PDF-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK-Guide/files/2764143/mynt-eye-s-sdk-guide-2.3.0-en.pdf) [![](https://img.shields.io/badge/Download-HTML-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK-Guide/files/2764145/mynt-eye-s-sdk-guide-2.3.0-en.zip) [![](https://img.shields.io/badge/Online-HTML-blue.svg?style=flat)](https://slightech.github.io/MYNT-EYE-S-SDK-Guide/)
   * zh-Hans: [![](https://img.shields.io/badge/Download-PDF-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK-Guide/files/2764150/mynt-eye-s-sdk-guide-2.3.0-zh-Hans.pdf) [![](https://img.shields.io/badge/Download-HTML-blue.svg?style=flat)](https://github.com/slightech/MYNT-EYE-S-SDK-Guide/files/2764163/mynt-eye-s-sdk-guide-2.3.0-zh-Hans.zip) [![](https://img.shields.io/badge/Online-HTML-blue.svg?style=flat)](http://doc.myntai.com/resource/sdk/mynt-eye-s-sdk-guide-2.3.0-zh-Hans/mynt-eye-s-sdk-guide-2.3.0-zh-Hans/index.html)
 
 > Supported languages: `en`, `zh-Hans`.