No Underline in Link

How do I stop the button text from being underlined? I don’t want to shut off underline on my whole site just for the buttons I’m creating. I’ve tried to add text-decoration: none to the html but the code keeps getting stripped out.
<p style="text-align: center;"><a class="fasc-button fasc-size-xlarge fasc-type-flat ico-fa fasc-ico-before fa-puzzle-piece" style="background-color: #ca0000; color: #ffffff; text-decoration: none;" href="http://affirmativeactionalliance.com/aaa-landmark-newsletter/" data-fasc-style="background-color:#ca0000;color:#ffffff;"> This is A Test</a></p>

https://wordpress.org/plugins/forget-about-shortcode-buttons/