diff --git a/apps-kustomized/cert-manager-webhook-dnsimple/args.yaml b/apps-kustomized/cert-manager-webhook-dnsimple/args.yaml
index 484d977..0b5d2c3 100644
--- a/apps-kustomized/cert-manager-webhook-dnsimple/args.yaml
+++ b/apps-kustomized/cert-manager-webhook-dnsimple/args.yaml
@@ -10,4 +10,4 @@ spec:
         args:
         - --tls-cert-file=/tls/tls.crt
         - --tls-private-key-file=/tls/tls.key
-        - --listen-port 8443
+        - --secure-port 8443