diff --git a/.gitmodules b/.gitmodules
index 72364a2dfed59..a7ab3e5070e4d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -12,7 +12,7 @@
 	url = git@github.com:nextcloud/richdocuments.git
 [submodule "apps-external/viewer"]
 	path = apps-external/viewer
-	url = git@github.com:nextcloud/viewer.git
+	url = git@github.com:IONOS-Productivity/nc-viewer.git
 [submodule "apps-external/contacts"]
 	path = apps-external/contacts
 	url = git@github.com:nextcloud/contacts.git
diff --git a/apps-external/viewer b/apps-external/viewer
index f127e1adf4a4e..975ac334de027 160000
--- a/apps-external/viewer
+++ b/apps-external/viewer
@@ -1 +1 @@
-Subproject commit f127e1adf4a4ea915156cfbb4b4e708a9e456347
+Subproject commit 975ac334de027edf48336eadbcb434aed05809fe