diff --git a/index.html.pre b/index.html.pre
index 2600766..f90586b 100644
--- a/index.html.pre
+++ b/index.html.pre
@@ -5,6 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <meta name="robots" content="index, follow">
 
+    <!-- bezahlbrudi is reachable via HTTP/3, TLS1.3 and IPv6. Only the hottest tech for my brudis! -->
+    <!-- try it with: curl -6 --tlsv1.3 --http3-only https://bezahlbrudi.jetzt -->
+
     <!-- mobile app and bookmarks -->
     <meta name="apple-mobile-web-app-capable" content="yes">
     <meta name="mobile-web-app-capable" content="yes">