diff --git a/flux/core/cilium/values.yml b/flux/core/cilium/values.yml
index 9e60a561..8e675956 100644
--- a/flux/core/cilium/values.yml
+++ b/flux/core/cilium/values.yml
@@ -56,6 +56,7 @@ hubble:
         gethomepage.dev/group: Observability
         gethomepage.dev/icon: cilium.png
         gethomepage.dev/name: Hubble
+        cert-manager.io/cluster-issuer: "letsencrypt"
       hosts:
         - &host "hubble.${DOMAIN}"
       tls: