diff --git a/scripts/boxesserver b/scripts/boxesserver
index 3eaeec0..16123b7 100755
--- a/scripts/boxesserver
+++ b/scripts/boxesserver
@@ -189,9 +189,11 @@ class BServer:
        if(e.style.display == null || e.style.display == "none") {
          e.style.display = "block";
          h.classList.add("open");
+         h.setAttribute("aria-expanded","true");
        } else {
          e.style.display = "none";
          h.classList.remove("open");
+         h.setAttribute("aria-expanded","false");
       }
     }
     function hideargs() {
@@ -245,7 +247,7 @@ class BServer:
             if len(group._group_actions) == 1 and isinstance(group._group_actions[0], argparse._HelpAction):
                 continue
             prefix = getattr(group, "prefix", None)
-            result.append('''<h3 id="h-%s" tabindex="0" class="open" onclick="showHide(%s)" onkeypress="if(event.keyCode == 13) showHide(%s)">%s</h3>\n<table role="presentation" id="%s">\n''' % (groupid, groupid, groupid, _(group.title), groupid))
+            result.append('''<h3 id="h-%s" role="button" aria-expanded="true" tabindex="0" class="open"  onclick="showHide(%s)" onkeypress="if(event.keyCode == 13) showHide(%s)">%s</h3>\n<table role="presentation" id="%s">\n''' % (groupid, groupid, groupid, _(group.title), groupid))
 
             for a in group._group_actions:
                 if a.dest in ("input", "output"):
@@ -345,7 +347,7 @@ class BServer:
 """ ]
         for nr, group in enumerate(self.groups):
             result.append(f'''
-<h3 id="h-{nr}" class="open" tabindex="0" onclick="showHide('{nr}')" onkeypress="if(event.keyCode == 13) showHide('{nr}')"
+<h3 id="h-{nr}" role="button" aria-expanded="false" class="open" tabindex="0" onclick="showHide('{nr}')" onkeypress="if(event.keyCode == 13) showHide('{nr}')"
      onmouseenter="change('{group.name}', 'static/samples/{group.thumbnail}')"
      onmouseleave="changeback('{group.name}')">{_(group.title)}</h3>
   <img style="width: 200px;" id="sample-{group.name}" src="static/nothing.png" alt="">