diff --git a/nixos/machines/lobon/configuration.nix b/nixos/machines/lobon/configuration.nix
index 506d637..8191acf 100644
--- a/nixos/machines/lobon/configuration.nix
+++ b/nixos/machines/lobon/configuration.nix
@@ -28,8 +28,8 @@
     };
     backupKey = {
       sopsFile = ./backupKey.yaml;
-      owner = "root";
-      group = "root";
+      owner = "mailman";
+      group = "mailman";
       mode = "0400";
     };
   };
diff --git a/nixos/modules/mailman.nix b/nixos/modules/mailman.nix
index 71403e6..695a173 100644
--- a/nixos/modules/mailman.nix
+++ b/nixos/modules/mailman.nix
@@ -131,8 +131,8 @@ in {
       };
       repo = "borg@192.168.1.11:lobon"; # TODO for https://gitea.mathebau.de/Fachschaft/nixConfig/issues/33
       startAt = "daily";
-      user = "root";
-      group = "root";
+      user = "mailman";
+      group = "mailman";
     };
   };
 }