diff --git a/06.PVE制作DNS服务器.md b/06.PVE制作DNS服务器.md
index cad68c1..7d1edb8 100644
--- a/06.PVE制作DNS服务器.md
+++ b/06.PVE制作DNS服务器.md
@@ -341,9 +341,13 @@ bind-tcp [::]:6053@lo
 
 prefetch-domain yes
 
+serve-expired yes
+serve-expired-ttl 129600
+serve-expired-reply-ttl 30
+serve-expired-prefetch-time 28800
+
 rr-ttl-min 60
 rr-ttl-max 21600
-rr-ttl-reply-max 3600
 
 force-qtype-SOA 65
 max-query-limit 1024
diff --git a/src/debian/debian_dns_smartdns.conf b/src/debian/debian_dns_smartdns.conf
index 6f69305..00ce62b 100644
--- a/src/debian/debian_dns_smartdns.conf
+++ b/src/debian/debian_dns_smartdns.conf
@@ -24,9 +24,13 @@ bind-tcp [::]:6053@lo
 
 prefetch-domain yes
 
+serve-expired yes
+serve-expired-ttl 129600
+serve-expired-reply-ttl 30
+serve-expired-prefetch-time 28800
+
 rr-ttl-min 60
 rr-ttl-max 21600
-rr-ttl-reply-max 3600
 
 force-qtype-SOA 65
 max-query-limit 1024