Update README.md

Author: albertcht

README.md

@@ -3,7 +3,7 @@
 ![php-badge](https://img.shields.io/badge/php-%3E%3D%205.5.9-8892BF.svg)
 [![packagist-badge](https://img.shields.io/packagist/v/swooletw/laravel-swoole.svg)](https://packagist.org/packages/swooletw/laravel-swoole)
 [![Total Downloads](https://poser.pugx.org/swooletw/laravel-swoole/downloads)](https://packagist.org/packages/swooletw/laravel-swoole)
-![travis-badge](https://api.travis-ci.org/swooletw/laravel-swoole.svg?branch=master)
+[![travis-badge](https://api.travis-ci.org/swooletw/laravel-swoole.svg?branch=master)](https://travis-ci.org/swooletw/laravel-swoole)
 
 This package provides a high performance HTTP server to speed up your laravel/lumen application based on [Swoole](http://www.swoole.com/).