@rgraham : Login to your WordPress admin section. Go to Appearance => Customize => Additional css and add the following css.
.main-navigation .dropdown-toggle:after,
.main-navigation .menu-item-has-children > a:after,
.main-navigation .page_item_has_children > a:after,
.entry-breadcrumbs a:after,
.author-link:after,
#cancel-comment-reply-link:before,
.custom-header-media .wp-custom-header-video-play:before,
.custom-header-media .wp-custom-header-video-pause:before,
.post-navigation .nav-previous .nav-subtitle:before,
.post-navigation .nav-next .nav-subtitle:after,
.entry-footer .cat-links::before,
.entry-footer .tags-links::before,
.comment-metadata > a:before,
.services-section .post-thumbnail a:after,
.team-section .post-thumbnail a:after,
.header-top-left-content li span .mobile-hours:before {
font-family: 'FontAwesome';
}
Let me know if this helps you out.
Regards,
Tikaram