diff --git a/manifests/alertmanager-secret.yaml b/manifests/alertmanager-secret.yaml
index ecd30d30..e019922b 100644
--- a/manifests/alertmanager-secret.yaml
+++ b/manifests/alertmanager-secret.yaml
@@ -10,12 +10,14 @@ stringData:
       "resolve_timeout": "5m"
     "inhibit_rules":
     - "equal":
+      - "namespace"
       - "alertname"
       "source_match":
         "severity": "critical"
       "target_match_re":
         "severity": "warning|info"
     - "equal":
+      - "namespace"
       - "alertname"
       "source_match":
         "severity": "warning"