--- a/website/features.html
+++ b/website/features.html
@@ -112,7 +112,8 @@
                   archives (needs <span class="command">Python</span>).</li>
 
                 <li><span class="literal">iCalendar</span>(.ics) files
-                  (needs <span class="command">Python, icalendar</span>).</li> 
+                  (needs <span class="command">Python, 
+<a href="http://pypi.python.org/pypi/icalendar/2.1">icalendar</a></span>).</li> 
 
                 <li><span class="literal">Wordperfect</span> with <a href=
                 "http://libwpd.sourceforge.net">libwpd</a>.</li>