WP_Query of related posts by array of categories of current post

wp_query.php

$cats = wp_get_post_terms( get_the_ID(), 'category' );
$cats_ids = array();
foreach( $cats as $wpex_related_cat ) {
	$cats_ids[] = $wpex_related_cat->term_id;
}
$args = array(
	'post_type' => 'post',
	'order' => 'ASC',
	'posts_per_page' => '3',
	'category__in' => $cats_ids,
	'post__not_in' => array($post->ID)
);