diff --git a/server.py b/server.py
index 4354886..d91518e 100644
--- a/server.py
+++ b/server.py
@@ -20,6 +20,7 @@ IPv6 games?
 If you want to register, simply submit your name below.
 Obviously, your name and IPv6 address will be publicly recorded.
 
+
 <h2>Register</h2>
 <form action="/" method=post>
 Your name: <input type="text" name="name">
@@ -32,6 +33,10 @@ Your name: <input type="text" name="name">
 {}
 </ul>
 
+<h2>Open Source</h2>
+As usual this project is open source and
+you can find the source code on
+<a href="https://code.ungleich.ch/nico/who-plays-ipv6-games">code.ungleich.ch</a>.
 </body>
 </html>
 """