diff --git a/machines/renge/services/prometheus.nix b/machines/renge/services/prometheus.nix
index 6f4db50..3efae4f 100644
--- a/machines/renge/services/prometheus.nix
+++ b/machines/renge/services/prometheus.nix
@@ -71,6 +71,11 @@ in
           "shinobu.vpn.sbruder.de:9100"
           "nazuna.vpn.sbruder.de:9100"
         ];
+        relabel_configs = lib.singleton {
+          target_label = "instance";
+          source_labels = lib.singleton "__address__";
+          regex = "(.*)\\.vpn\\.sbruder\\.de:9100";
+        };
       }
       {
         job_name = "qbittorrent";
@@ -176,7 +181,7 @@ in
             rules = map mkAlert [
               {
                 name = "InstanceDown";
-                expr = ''up{instance!~"(nunotaba|hitagi|mayushii|fuuko).vpn.sbruder.de:.*"} == 0'';
+                expr = ''up{instance!~"(nunotaba|hitagi|mayushii|fuuko)"} == 0'';
                 description = "Instance {{ $labels.instance }} of job {{ $labels.job }} has been down for more than 1 minutes.";
               }
               {