Filter class into wp_list_bookmarks?

here is my code

<ul class=”friendsroll”><?php wp_list_bookmarks(‘title_li=&categorize=0&category=224&orderby=rand&limit=20’); ?>

and it echos like this

<a target=”_blank” rel=”met” href=”https://www.mysite.com/”>mysite</a>

and how can I define the link’s class makes it like this
<a class=”no_icon” target=”_blank” rel=”met” href=”https://www.mysite.com/”>mysite</a>
how to change my code