/* Mime Types Support */
add_filter('upload_mimes', 'custom_mime_types', 999999);

function custom_mime_types($mimes) {
  $mimes['otf'] = 'application/x-font-opentype';
  $mimes['woff'] = 'application/font-woff';
  $mimes['woff2'] = 'application/font-woff2';
  return $mimes;
}

/* Custom Font Types Support */
add_filter('et_pb_supported_font_formats', 'custom_font_formats', 1);

function custom_font_formats() { 
return array('otf', 'woff', 'woff2');
}