Add the following jQuery code to your site “Divi > Theme Options > Integration > Add this code to the head of you blog” box.

<script>
jQuery(function($){
  $('.et_pb_toggle_title').click(function(){
    var $toggle = $(this).closest('.et_pb_toggle');
    if (!$toggle.hasClass('et_pb_accordion_toggling')) {
      var $accordion = $toggle.closest('.et_pb_accordion');
      if ($toggle.hasClass('et_pb_toggle_open')) {
        $accordion.addClass('et_pb_accordion_toggling');
        $toggle.find('.et_pb_toggle_content').slideToggle(700, function() { 
          $toggle.removeClass('et_pb_toggle_open').addClass('et_pb_toggle_close'); 
                    
        });
      }
      setTimeout(function(){ 
        $accordion.removeClass('et_pb_accordion_toggling'); 
      }, 750);
    }
  });
});
</script>