diff --git a/hosts/monitoring-3/rules.yml b/hosts/monitoring-3/rules.yml
index 18f08b6..9af4c0b 100644
--- a/hosts/monitoring-3/rules.yml
+++ b/hosts/monitoring-3/rules.yml
@@ -2,7 +2,7 @@ groups:
 - name: alert.rules
   rules:
   - alert: InstanceDown
-    expr: up == 0
+    expr: up{job="node-exporter"} == 0
     for: 1m
     labels:
       severity: critical