diff --git a/source/_includes/footer.html.twig b/source/_includes/footer.html.twig
index ca262aa1..555e4011 100644
--- a/source/_includes/footer.html.twig
+++ b/source/_includes/footer.html.twig
@@ -1,4 +1,4 @@
-<footer class="border-t border-grey-lighter pt-4 mt-4">
+<footer class="border-t border-grey-lighter pt-4 mt-4" role="contentinfo">
     <p>
         &copy; 2010-{{ 'now'|date('Y') }} {{ site.title }}. Built with <a href="https://sculpin.io">Sculpin</a> and <a href="https://tailwindcss.com">Tailwind CSS</a>.
     </p>
diff --git a/source/_includes/nav.html.twig b/source/_includes/nav.html.twig
index e5715a16..333b6bd8 100644
--- a/source/_includes/nav.html.twig
+++ b/source/_includes/nav.html.twig
@@ -1,4 +1,4 @@
-<div class="navbar border-bottom border-b border-grey-lighter mb-6">
+<div class="navbar border-bottom border-b border-grey-lighter mb-6" role="banner">
     <header class="container mx-auto px-4">
         <div class="sm:flex">
             <div class="w-full sm:w-1/3 lg:w-1/4 flex items-center">
@@ -24,7 +24,7 @@
                 { title: 'Contact', href: '/contact', pattern: '^/contact/?' }
             ] %}
 
-            <nav class="hidden w-full md:w-2/3 lg:w-3/4 sm:flex sm:flex-wrap sm:justify-end">
+            <nav class="hidden w-full md:w-2/3 lg:w-3/4 sm:flex sm:flex-wrap sm:justify-end" role="navigation">
                 {% for link in links %}
                     <a href="{{ link.href }}" class="flex items-center -mx-4 p-4 sm:border-b-3 sm:border-transparent sm:ml-4 sm:mr-0 sm:p-0 {{ loop.first ? 'border-t border-grey-lighter sm:border-t-0 sm:border-transparent' }} {{ page.url matches '#' ~ link.pattern ~ '#' ? 'sm:bg-transparent sm:border-blue' }}">
                         {{ link.title }}
diff --git a/source/_includes/sidebar.html.twig b/source/_includes/sidebar.html.twig
index 07d1e47f..bb40ea25 100644
--- a/source/_includes/sidebar.html.twig
+++ b/source/_includes/sidebar.html.twig
@@ -1,5 +1,5 @@
 {% block sidebar_wrapper %}
-    <div class="md:w-1/4 px-4">
+    <div class="md:w-1/4 px-4" role="complementary">
         {% block sidebar %}
             {% include 'availability' %}
             {% include 'posts/latest' %}
diff --git a/source/_layouts/default.html.twig b/source/_layouts/default.html.twig
index bd6c4a70..3e3f23d2 100644
--- a/source/_layouts/default.html.twig
+++ b/source/_layouts/default.html.twig
@@ -6,7 +6,7 @@
 
         <div class="container mx-auto px-4">
             <div class="md:flex -mx-4">
-                <main class="md:w-3/4 px-4 mb-8 lg:mb-0">
+                <main class="md:w-3/4 px-4 mb-8 lg:mb-0" role="main">
                     {% block content_top %}{% endblock %}
                     {% block content_wrapper %}{% block content %}{% endblock %}{% endblock %}
                     {% block content_bottom %}{% endblock %}