Posts_per_page not working with date_query

Hello, im trying to show the most commented 5 post in the last week, here is my code

$args = array(
'post_type' => 'post',
'post_status' => 'publish',
'orderby' => 'comment_count',

'order' => 'DESC',
'date_query' => array(
		array(
			'year' => date('Y'),
			'week' => date('W'),
		),
	),
'posts_per_page'=> 5,
);

  $the_query = new WP_Query($args); 

  while ( $the_query->have_posts()) :  $the_query->the_post(); ?>

That returns me over 300 posts, tho they are ordered by comment cound, how to fix that