diff --git a/aqt/about.py b/aqt/about.py
index 2b6384dfc..73ca276b6 100644
--- a/aqt/about.py
+++ b/aqt/about.py
@@ -27,8 +27,8 @@ Luca Ban, Marco Giancotti, Marcus Rubeus, Mari Egami, Michael Jürges, Mark Wilb
 Matthew Duggan, Matthew Holtz, Meelis Vasser, Michael Keppler, Michael
 Montague, Michael Penkov, Michal Čadil, Nathanael Law, Nick Cook, Niklas
 Laxström, Nguyễn Hào Khôi, Norbert Nagold, Ole Guldberg,
-Pcsl88, Petr Michalec, Piotr Kubowicz, Richard Colley, Samson Melamed,
-Stefaan De Pooter, Susanna Björverud, Sylvain Durand,
+Pcsl88, Petr Michalec, Piotr Kubowicz, Richard Colley, Roland Sieker,
+Samson Melamed, Stefaan De Pooter, Susanna Björverud, Sylvain Durand,
 Tacutu, Timm Preetz, Timo Paulssen, Ursus, Victor Suba, %s
 Xtru."""% _("<!--about diag--> and")}
     abouttext += '<p>' + _("""\