diff --git a/06.PVE制作DNS服务器.md b/06.PVE制作DNS服务器.md
index 398c76d..9527556 100644
--- a/06.PVE制作DNS服务器.md
+++ b/06.PVE制作DNS服务器.md
@@ -340,10 +340,10 @@ bind [::]:6053@lo
 bind-tcp [::]:6053@lo
 
 serve-expired yes
-serve-expired-ttl 259200
+serve-expired-ttl 129600
 serve-expired-reply-ttl 30
 prefetch-domain yes
-serve-expired-prefetch-time 28800
+serve-expired-prefetch-time 21600
 
 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 81033a9..3126aaa 100644
--- a/src/debian/debian_dns_smartdns.conf
+++ b/src/debian/debian_dns_smartdns.conf
@@ -22,10 +22,10 @@ bind [::]:6053@lo
 bind-tcp [::]:6053@lo
 
 serve-expired yes
-serve-expired-ttl 259200
+serve-expired-ttl 129600
 serve-expired-reply-ttl 30
 prefetch-domain yes
-serve-expired-prefetch-time 28800
+serve-expired-prefetch-time 21600
 
 force-qtype-SOA 65
 max-query-limit 1024