diff --git a/configs/sputnik/nginx.nix b/configs/sputnik/nginx.nix
index 5803790..a2be921 100644
--- a/configs/sputnik/nginx.nix
+++ b/configs/sputnik/nginx.nix
@@ -150,6 +150,7 @@
           proxyPass = "http://nextcloud.workhorse.private";
           extraConfig = ''
             sub_filter "http://nextcloud.ingolf-wagner.de" "https://nextcloud.ingolf-wagner.de";
+            sub_filter "nextcloud.workhorse.private" "nextcloud.ingolf-wagner.de";
             # used for view/edit office file via Office Online Server
             client_max_body_size 0;
           '';
@@ -175,6 +176,7 @@
           proxyPass = "http://nextcloud.workhorse.private";
           extraConfig = ''
             sub_filter "http://nextcloud.gaykraft.com" "https://nextcloud.gaykraft.com";
+            sub_filter "nextcloud.workhorse.private" "nextcloud.gaykraft.com";
             # used for view/edit office file via Office Online Server
             client_max_body_size 0;
           '';