diff --git a/services/monitoring/prometheus.nix b/services/monitoring/prometheus.nix
index 61c1834..7f7c6f4 100644
--- a/services/monitoring/prometheus.nix
+++ b/services/monitoring/prometheus.nix
@@ -48,7 +48,7 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "Instance {{ $labels.instance }} down"
                   description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes."
               - alert: low_disk_space
@@ -56,7 +56,7 @@
                 for: 5m
                 labels:
                   severity: warning
-                annotations: 
+                annotations:
                   summary: "Disk space low on {{ $labels.instance }}"
                   description: "Disk space is low on {{ $labels.instance }}. Please check."
               - alert: high_cpu_load
@@ -64,7 +64,7 @@
                 for: 5m
                 labels:
                   severity: warning
-                annotations: 
+                annotations:
                   summary: "High CPU load on {{ $labels.instance }}"
                   description: "CPU load is high on {{ $labels.instance }}. Please check."
           - name: nameserver_rules 
@@ -74,7 +74,7 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "Unbound not running on {{ $labels.instance }}"
                   description: "Unbound has been down on {{ $labels.instance }} more than 5 minutes."
               - alert: nsd_down
@@ -82,7 +82,7 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "NSD not running on {{ $labels.instance }}"
                   description: "NSD has been down on {{ $labels.instance }} more than 5 minutes."
           - name: http-proxy_rules 
@@ -92,9 +92,19 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "Caddy not running on {{ $labels.instance }}"
                   description: "Caddy has been down on {{ $labels.instance }} more than 5 minutes."
+          - name: nats_rules
+            rules:
+              - alert: nats down
+                expr: node_systemd_unit_state {instance="nats1.home.2rjus.net:9100", name = "nats.service", state = "active"} == 0
+                for: 5m
+                labels:
+                  severity: critical
+                annotations:
+                  summary: "NATS not running on {{ $labels.instance }}"
+                  description: "NATS has been down on {{ $labels.instance }} more than 5 minutes."
           - name: home_assistant_rules 
             rules:
               - alert: home_assistant_down 
@@ -102,7 +112,7 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "Home assistant not running on {{ $labels.instance }}"
                   description: "Home assistant has been down on {{ $labels.instance }} more than 5 minutes."
               - alert: zigbee2qmtt_down 
@@ -110,7 +120,7 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "Zigbee2mqtt not running on {{ $labels.instance }}"
                   description: "Zigbee2mqtt has been down on {{ $labels.instance }} more than 5 minutes."
               - alert: mosquitto_down
@@ -118,7 +128,7 @@
                 for: 5m
                 labels:
                   severity: critical
-                annotations: 
+                annotations:
                   summary: "Mosquitto not running on {{ $labels.instance }}"
                   description: "Mosquitto has been down on {{ $labels.instance }} more than 5 minutes."
       ''
@@ -140,6 +150,7 @@
               "ns1.home.2rjus.net:9100"
               "ns2.home.2rjus.net:9100"
               "pgdb1.home.2rjus.net:9100"
+              "nats1.home.2rjus.net:9100"
             ];
           }
         ];