Update README.md

README.md

@@ -1,5 +1,7 @@
 # MailChecker
-[![Build Status](https://img.shields.io/circleci/project/FGRibreau/mailchecker.svg)](https://circleci.com/gh/FGRibreau/mailchecker/) [![Deps](	https://img.shields.io/david/FGRibreau/mailchecker.svg)](https://david-dm.org/FGRibreau/mailchecker) [![NPM version](https://img.shields.io/npm/v/mailchecker.svg)](http://badge.fury.io/js/mailchecker) [![Gem version](https://img.shields.io/gem/v/ruby-mailchecker.svg)](http://badge.fury.io/js/mailchecker) [![Packagist version](https://img.shields.io/packagist/v/FGRibreau/mailchecker.svg)](https://packagist.org/packages/fgribreau/mailchecker) [![Downloads](http://img.shields.io/npm/dm/mailchecker.svg)](https://www.npmjs.com/package/mailchecker) ![extra](https://img.shields.io/badge/actively%20maintained-yes-ff69b4.svg?)
+[![Build Status](https://img.shields.io/circleci/project/FGRibreau/mailchecker.svg)](https://circleci.com/gh/FGRibreau/mailchecker/) [![Deps](	https://img.shields.io/david/FGRibreau/mailchecker.svg)](https://david-dm.org/FGRibreau/mailchecker) [![NPM version](https://img.shields.io/npm/v/mailchecker.svg)](http://badge.fury.io/js/mailchecker) [![Gem version](https://img.shields.io/gem/v/ruby-mailchecker.svg)](http://badge.fury.io/js/mailchecker) [![Packagist version](https://img.shields.io/packagist/v/FGRibreau/mailchecker.svg)](https://packagist.org/packages/fgribreau/mailchecker) [![Downloads](http://img.shields.io/npm/dm/mailchecker.svg)](https://www.npmjs.com/package/mailchecker) 
+
+[![available-for-advisory](https://img.shields.io/badge/available%20for%20advising-yes-ff69b4.svg?)](http://bit.ly/2c7uFJq) ![extra](https://img.shields.io/badge/actively%20maintained-yes-ff69b4.svg?)
 
 Cross-language email validation. Backed by a [database](./list.json) of **2740 throwable email providers**.