diff --git a/doc/ack.xml b/doc/ack.xml
index 697d490..46c5696 100644
--- a/doc/ack.xml
+++ b/doc/ack.xml
@@ -29,12 +29,14 @@ UMLGraph would not be in its current state without their contributions.
 <li>Georgios Gousios</li>
 <li>Antti Hakala</li>
 <li>Art Hampton</li>
+<li>Alan Jeffrey</li>
 <li>&#216;yvind Jergan</li>
 <li>Scott Johnson</li>
 <li>Gunho Kim</li>
 <li>Nikita Kozlov</li>
 <li>Trustin Lee</li>
 <li>Joshua Lim</li>
+<li>Stefano Martina</li>
 <li>Vadim Nasardinov</li>
 <li>Laird Nelson</li>
 <li>Bernd Onasch</li>