diff --git a/hosts/hainich/services/mattermost.nix b/hosts/hainich/services/mattermost.nix
index eb3fb88..19b172e 100644
--- a/hosts/hainich/services/mattermost.nix
+++ b/hosts/hainich/services/mattermost.nix
@@ -22,7 +22,7 @@
       # there's two mattermost modules ...
       services.mattermost-patched = {
         enable = true;
-        siteUrl = "https://mattermost.infra4future.de";
+        siteUrl = "https://mattermost-beta.infra4future.de";
         siteName = "Mattermost - Blabla for Future";
         listenAddress = "[::]:3000";
         mutableConfig = false;
@@ -193,7 +193,7 @@
     };
   };
 
-  services.nginx.virtualHosts."mattermost.infra4future.de" = {
+  services.nginx.virtualHosts."mattermost-beta.infra4future.de" = {
     locations."/".proxyPass = "http://[${config.containers.mattermost.localAddress6}]:3000";
     forceSSL = true;
     enableACME = true;