diff --git a/README.md b/README.md
index eca220a..44fefb0 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,12 @@ This is a PHP script that creates sort of a calculation environment for working
 vectors. Not only will it calculate various operations with vectors, it will also plot
 them, calculate angles between different vectors, intersection points, etc.
 
+Online Demo
+-----------
+
+https://vect.birth-online.de
+
+
 Syntax
 ------
 
diff --git a/vect.php b/vect.php
index 2d37178..9d78554 100644
--- a/vect.php
+++ b/vect.php
@@ -874,7 +874,7 @@ PRE.sol {
 echo '<a href="' . $_SERVER['PHP_SELF'];
 if (!isset($_GET['dbg'])) echo '?dbg';
 echo '">Debug ' . ((isset($_GET['dbg']))?'off':'on') . '</a>';
-?>
+?> / <a href="https://github.com/mbirth/php-vectcalc">GitHub</a>
 <table border="0" class="vars" cellpadding="0" cellspacing="1">
 	<tr>
 		<th colspan="2">Variables</th>