diff --git a/_includes/nav.html b/_includes/nav.html
index 0d2e6ef..9d322dc 100644
--- a/_includes/nav.html
+++ b/_includes/nav.html
@@ -62,7 +62,9 @@
       {%- unless node.nav_exclude -%}
       <li class="nav-list-item{% if page.collection == include.key and page.url == node.url or page.parent == node.title or page.grand_parent == node.title %} active{% endif %}">
         {%- if node.has_children -%}
-          <a href="#" class="nav-list-expander"><svg viewBox="0 0 24 24"><use xlink:href="#svg-arrow-right"></use></svg></a>
+          <a href="#" class="nav-list-expander" aria-label="toggle links in {{ node.title }} category">
+            <svg viewBox="0 0 24 24"><use xlink:href="#svg-arrow-right"></use></svg>
+          </a>
         {%- endif -%}
         <a href="{{ node.url | relative_url }}" class="nav-list-link{% if page.url == node.url %} active{% endif %}">{{ node.title }}</a>
         {%- if node.has_children -%}
@@ -76,7 +78,9 @@
             {%- unless child.nav_exclude -%}
             <li class="nav-list-item {% if page.url == child.url or page.parent == child.title %} active{% endif %}">
               {%- if child.has_children -%}
-                <a href="#" class="nav-list-expander"><svg viewBox="0 0 24 24"><use xlink:href="#svg-arrow-right"></use></svg></a>
+                <a href="#" class="nav-list-expander" aria-label="toggle links in {{ child.title }} category">
+                  <svg viewBox="0 0 24 24"><use xlink:href="#svg-arrow-right"></use></svg>
+                </a>
               {%- endif -%}
               <a href="{{ child.url | relative_url }}" class="nav-list-link{% if page.url == child.url %} active{% endif %}">{{ child.title }}</a>
               {%- if child.has_children -%}