diff --git a/nixos/modules/services/monitoring/uptime-kuma.nix b/nixos/modules/services/monitoring/uptime-kuma.nix
index c673a09832b0..85f96f9e9c7f 100644
--- a/nixos/modules/services/monitoring/uptime-kuma.nix
+++ b/nixos/modules/services/monitoring/uptime-kuma.nix
@@ -64,6 +64,7 @@ in
         PrivateDevices = true;
         PrivateMounts = true;
         PrivateTmp = true;
+        PrivateUsers = true;
         ProtectClock = true;
         ProtectControlGroups = true;
         ProtectHome = true;