diff --git a/docs/manual/conceptstypeslist.html b/docs/manual/conceptstypeslist.html
index 0020b646a..efd965a41 100644
--- a/docs/manual/conceptstypeslist.html
+++ b/docs/manual/conceptstypeslist.html
@@ -30,5 +30,7 @@
 
 <h3>Optional Types</h3>
 <a href="OptionalTypes/classfileset.html">Class Fileset</a><br>
+<a href="OptionalTypes/extension.html">Extension Package</a><br>
+<a href="OptionalTypes/extensionset.html">Set of Extension Packages</a><br>
 </body>
 </html>