Edit File: head.tpl
<!-- This whole tempalte goes to inside <head></head> tags Modify this file to add javascript or css files for your page from customize/static folder Jinja2 (which is index.html template engine) is not allowed to use here. Please, restart captcha server after your changes. service imunify360-captcha restart service imunify360-captchaserver-nginx restart Example: <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script> Add your custom css from customize/static/ folder <link type="text/css" rel="stylesheet" href="static/my.css"> -->