diff --git a/prow/monitoring/grafana_expose.yaml b/prow/monitoring/grafana_expose.yaml
index e53e26b9797f..fac13c7cf7d0 100644
--- a/prow/monitoring/grafana_expose.yaml
+++ b/prow/monitoring/grafana_expose.yaml
@@ -20,6 +20,7 @@ apiVersion: extensions/v1beta1
 kind: Ingress
 metadata:
   annotations:
+    kubernetes.io/ingress.allow-http: "false"
     kubernetes.io/ingress.global-static-ip-name: prow-monitoring-grafana
     kubernetes.io/tls-acme: "true"
     certmanager.k8s.io/cluster-issuer: letsencrypt-prod