Update README.md

Author: imajinyun

README.md

@@ -7,6 +7,7 @@
 [![StyleCI](https://github.styleci.io/repos/363634864/shield?branch=master)](https://github.styleci.io/repos/363634864?branch=master)
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=leetcode-php&metric=alert_status)](https://sonarcloud.io/dashboard?id=leetcode-php)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/imajinyun/leetcode-php/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/imajinyun/leetcode-php/?branch=master)
+[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fimajinyun%2Fleetcode-php.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2Fimajinyun%2Fleetcode-php?ref=badge_shield)
 [![Version](https://img.shields.io/static/v1?label=version&message=%3E%3D8.0&color=%234F5893&labelColor=grey&logo=PHP&logoColor=blue&style=flat&link=https%3A%2F%2Fwww.php.net%2Fsupported-versions.php)](https://www.php.net/supported-versions.php)
 
 ## Requirements