diff --git a/k8s/infra/monitoring/values.yaml b/k8s/infra/monitoring/values.yaml
index ea69276..40a2e30 100644
--- a/k8s/infra/monitoring/values.yaml
+++ b/k8s/infra/monitoring/values.yaml
@@ -120,7 +120,14 @@ alertmanager:
       group_interval: 5m
       repeat_interval: 4h
       receiver: hermes-monitor
+      routes:
+        # Watchdog (heartbeat interne kube-prometheus-stack) — silencé
+        - matchers:
+            - alertname = "Watchdog"
+          receiver: "null"
+          repeat_interval: 24h
     receivers:
+      - name: "null"
       - name: hermes-monitor
         webhook_configs:
           - url: 'http://192.168.10.1:9093/webhook'