diff --git a/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/external-dns.rules.yml b/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/external-dns.rules.yml
index ed011945..6ba5a7fa 100644
--- a/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/external-dns.rules.yml
+++ b/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/external-dns.rules.yml
@@ -47,7 +47,7 @@ spec:
       annotations:
         description: '{{`external-dns in namespace {{ $labels.namespace }}) is down.`}}'
         opsrecipe: external-dns-down/
-      expr: label_replace(up{container=~"external-dns", provider=~"aws|capa|capz|eks"}, "ip", "$1.$2.$3.$4", "node", "ip-(\\d+)-(\\d+)-(\\d+)-(\\d+).*") == 0
+      expr: label_replace(up{container="external-dns", provider=~"aws|capa|capz|eks"}, "ip", "$1.$2.$3.$4", "node", "ip-(\\d+)-(\\d+)-(\\d+)-(\\d+).*") == 0
       for: 15m
       labels:
         area: platform