diff --git a/demo/index.html b/demo/index.html
index 341e0dc..39044fb 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -131,7 +131,7 @@ <h1 class="font-weight-normal">ZkInterface messages</h1>
       See the
       <a href="https://github.com/QED-it/zkinterface/blob/master/zkinterface.fbs">interface definition</a>
       and the
-      <a href="https://github.com/QED-it/zkinterface/blob/master/zkinterface.fbs">paper</a>
+      <a href="https://github.com/QED-it/zkinterface/blob/master/zkInterface.pdf">paper</a>
       for details.
     </p>
   </div>
@@ -210,4 +210,4 @@ <h2 class="display-5">Verifier's View</h2>
 <!-- <script src="node_modules/jquery/dist/jquery.slim.min.js" integrity="sha256-pasqAKBDmFT4eHoN2ndd6lN370kFiGUFyTiUHWhU7k8=" crossorigin="anonymous"></script>
 <script src="node_modules/bootstrap/dist/js/bootstrap.bundle.min.js" integrity="sha384-xrRywqdh3PHs8keKZN+8zzc5TX0GRTLCcmivcbNJWm2rs5C8PRhcEn3czEjhAO9o" crossorigin="anonymous"></script> -->
 
-</body></html>
\ No newline at end of file
+</body></html>