Menu Class

Has somthing changes in latest version of WordPress with the Navigation menu?

<?php /* Primary navigation */
	wp_nav_menu( array(
		'menu' => 'top_menu',
		'depth' => 2,
		'container' => false,
		'menu_class' => 'nav nav-justified',
		//Process nav menu using our custom nav walker
		'walker' => new wp_bootstrap_navwalker())
	);
?>

I was using this before and then ‘menu_class’ => ‘nav nav-justified’, would add the class to the ul tag in the menu but now it is adding it to a new div tag that is wrapped around the ul?