diff --git a/themes/leilukin/content/sidebar.twig b/themes/leilukin/content/sidebar.twig
index 821fcc0..99e7699 100644
--- a/themes/leilukin/content/sidebar.twig
+++ b/themes/leilukin/content/sidebar.twig
@@ -1,4 +1,4 @@
-<div id="sidebar" role="banner">
+<aside id="sidebar" role="banner">
 <h1><a href="{{ url('/') }}">{{ site.name }}</a></h1>
 <form class="search_box" action="{{ url('search') }}" method="post" accept-charset="UTF-8" role="search">
 <input type="text" id="sidebar_search_field" name="query" value="{{ search is defined ? search | fix(true, true) : '' }}" placeholder="{{ 'Search&hellip;' | translate }}" aria-label="{{ 'Search this blog' | translate }}">
@@ -98,4 +98,4 @@
 {% endfor %}
 </ul>
 {% endif %}
-</div>
+</aside>
diff --git a/themes/leilukin/layouts/default.twig b/themes/leilukin/layouts/default.twig
index 7aa2566..1a48a2b 100644
--- a/themes/leilukin/layouts/default.twig
+++ b/themes/leilukin/layouts/default.twig
@@ -47,15 +47,15 @@
 {% include "content/sidebar.twig" %}
 {% if posts.paginated is defined and posts.prev_page() %}
 <!-- Navigation -->
-<div role="navigation" class="prev traversal">{{ posts.prev_link("Newer posts" | translate) }}</div>
+<nav role="navigation" class="prev traversal">{{ posts.prev_link("Newer posts" | translate) }}</nav>
 {% endif %}
 <!-- Content -->
-<div id="main" role="main">
+<main id="main" role="main">
 {% block content %}{% endblock %}
-</div>
+</main>
 {% if posts.paginated is defined and posts.next_page() %}
 <!-- Navigation -->
-<div role="navigation" class="next traversal">{{ posts.next_link("Older posts" | translate) }}</div>
+<nav role="navigation" class="next traversal">{{ posts.next_link("Older posts" | translate) }}</nav>
 {% endif %}
 {{ trigger.call("end_content") }}
 </body>