diff --git a/kubernetes/apps/monitoring/grafana/app/helmrelease.yaml b/kubernetes/apps/monitoring/grafana/app/helmrelease.yaml
index 88c6cfc331a..2f3f0fcfa87 100644
--- a/kubernetes/apps/monitoring/grafana/app/helmrelease.yaml
+++ b/kubernetes/apps/monitoring/grafana/app/helmrelease.yaml
@@ -85,6 +85,7 @@ spec:
       annotations:
         hajimari.io/icon: simple-icons:grafana
         external-dns.alpha.kubernetes.io/target: "ingress.${SECRET_DOMAIN}"
+        cert-manager.io/cluster-issuer: letsencrypt-production
       hosts:
         - &host "grafana.monitoring.${SECRET_DOMAIN}"
       tls: