diff --git a/apps/k8s01/dns/dns.yaml b/apps/k8s01/dns/dns.yaml
index ff147764491aea18a5f8eb26affaf0613fe8c75d..df7cdf510716f0c810a9f0e39f2516bcb2d574a3 100644
--- a/apps/k8s01/dns/dns.yaml
+++ b/apps/k8s01/dns/dns.yaml
@@ -16,6 +16,7 @@ data:
       groups:
         default:
           - https://dns.quad9.net/dns-query
+          - tcp-tls:dns.quad9.net:853
     bootstrapDns:
       - https://1.1.1.1/dns-query
       - tcp+udp:9.9.9.9