Change buttons in Beaver Builder Accordion module

style.css

/**
 * Change default buttons with font awesome icons
 * assign pro-ac-1 class to accordion
 *
 * @author Davinder Singh Kainth
 * @link http://probeaver.com/?p=179
 *
 */

.pro-ac-1 .fa-plus:before {
  content: "\f078";
}
.pro-ac-1 .fa-minus:before {
  content: "\f077";
}