diff --git a/internal/godoc/dochtml/template_sidenav.go b/internal/godoc/dochtml/template_sidenav.go
index cc3e041..4fefb08 100644
--- a/internal/godoc/dochtml/template_sidenav.go
+++ b/internal/godoc/dochtml/template_sidenav.go
@@ -24,7 +24,7 @@
 					<a href="#pkg-variables" role="treeitem" aria-level="1" tabindex="-1">Variables</a>
 				</li>
 				<li class="DocNav-functions" role="none">
-					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="true" aria-level="1" aria-owns="nav-group-functions" tabindex="-1">Functions</span>
+					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="false" aria-level="1" aria-owns="nav-group-functions" tabindex="-1">Functions</span>
 					<ul role="group" id="nav-group-functions">
 						{{range .Funcs}}
 							<li role="none">
@@ -34,7 +34,7 @@
 					</ul>
 				</li>
 				<li class="DocNav-types" role="none">
-					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="true" aria-level="1" aria-owns="nav-group-types" tabindex="-1">Types</span>
+					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="false" aria-level="1" aria-owns="nav-group-types" tabindex="-1">Types</span>
 					<ul role="group" id="nav-group-types">
 						{{range .Types}}
 							{{$tname := .Name}}
@@ -42,7 +42,7 @@
 								{{if or .Funcs .Methods}}
 									{{$navgroupname := (printf "nav.group.%s" $tname)}}
 									{{$navgroupid := (safe_id $navgroupname)}}
-									<a class="DocNav-groupLabel" href="#{{$tname}}" role="treeitem" aria-expanded="true" aria-level="2" data-aria-owns="{{$navgroupid}}" tabindex="-1">type {{$tname}}</a>
+									<a class="DocNav-groupLabel" href="#{{$tname}}" role="treeitem" aria-expanded="false" aria-level="2" data-aria-owns="{{$navgroupid}}" tabindex="-1">type {{$tname}}</a>
 									<ul role="group" id="{{$navgroupid}}">
 										{{range .Funcs}}
 											<li role="none">
@@ -63,7 +63,7 @@
 					</ul>
 				</li>
 				<li class="DocNav-notes" role="none">
-					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="true" aria-level="1" aria-owns="nav-group-notes" tabindex="-1">Notes</span>
+					<span class="DocNav-groupLabel" role="treeitem" aria-expanded="false" aria-level="1" aria-owns="nav-group-notes" tabindex="-1">Notes</span>
 					<ul role="group" id="nav-group-notes">
 						{{range $marker, $item := .Notes}}
 							<li role="none">