diff --git a/.gitmodules b/.gitmodules
index 2d927717..ff8a3238 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,15 +1,15 @@
 [submodule "source/webmail-user-guide/roundcubemail"]
 	path = source/webmail-user-guide/roundcubemail
 	url = https://github.com/roundcube/roundcubemail-helpdocs
 	ignore = dirty
 [submodule "source/webmail-user-guide/roundcubemail-plugins-kolab"]
 	path = source/webmail-user-guide/roundcubemail-plugins-kolab
 	url = https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git
 	ignore = dirty
 [submodule "ext/kolab"]
 	path = ext/kolab
 	url = https://git.kolab.org/diffusion/DS/docs-sphinx-ext.git
 	ignore = dirty
 [submodule "ext/kolabnow"]
 	path = ext/kolabnow
-	url = ssh://git.kolabsys.com/git/sphinx-theme-kolabnow
+	url = ssh://git@git.kolab.org/diffusion/STK/sphinx-theme-kolabnow.git