diff --git a/sidebar.php b/sidebar.php
index d792376..dbdfe4a 100644
--- a/sidebar.php
+++ b/sidebar.php
@@ -527,10 +527,14 @@ $author_desc = get_option('argon_sidebar_author_description');
 												$(document).headIndex({
 													articleWrapSelector: '#post_content',
 													indexBoxSelector: '#leftbar_catalog',
+													indexScrollBoxSelector: '#leftbar_part2_inner',
+													scrollSelector: 'body,html',
+													scrollWrap: window,
 													subItemBoxClass: "index-subItem-box",
 													itemClass: "index-item",
 													linkClass: "index-link",
 													offset: 80,
+													defaultExpanded: true
 												});
 											});
 										} else {