diff --git a/rootfs/usr/local/etc/docker/init.d/02-named.sh b/rootfs/usr/local/etc/docker/init.d/02-named.sh
index aa47f54..2fc4317 100755
--- a/rootfs/usr/local/etc/docker/init.d/02-named.sh
+++ b/rootfs/usr/local/etc/docker/init.d/02-named.sh
@@ -283,6 +283,7 @@ __update_conf_files() {
   [ -n "$KEY_DHCP" ] && echo "$KEY_DHCP" >"$CONF_DIR/secrets/dhcp.key"
   [ -n "$KEY_BACKUP" ] && echo "$KEY_BACKUP" >"$CONF_DIR/secrets/backup.key"
   [ -n "$KEY_CERTBOT" ] && echo "$KEY_CERTBOT" >"$CONF_DIR/secrets/certbot.key"
+  [ -f "$VAR_DIR/root.cache" ] || cp -Rf "/usr/local/share/bind/data/root.cache" "$VAR_DIR/root.cache"
   # exit function
   return $exitCode
 }
diff --git a/rootfs/usr/local/share/bind/data/root.cache b/rootfs/usr/local/share/bind/data/root.cache
new file mode 100644
index 0000000..3d2a8c1
--- /dev/null
+++ b/rootfs/usr/local/share/bind/data/root.cache
@@ -0,0 +1,81 @@
+;       last update:     August 14, 2024
+;       related version of root zone:     2024081401
+; 
+; FORMERLY NS.INTERNIC.NET 
+;
+.                        3600000      NS    A.ROOT-SERVERS.NET.
+A.ROOT-SERVERS.NET.      3600000      A     198.41.0.4
+A.ROOT-SERVERS.NET.      3600000      AAAA  2001:503:ba3e::2:30
+; 
+; FORMERLY NS1.ISI.EDU 
+;
+.                        3600000      NS    B.ROOT-SERVERS.NET.
+B.ROOT-SERVERS.NET.      3600000      A     170.247.170.2
+B.ROOT-SERVERS.NET.      3600000      AAAA  2801:1b8:10::b
+; 
+; FORMERLY C.PSI.NET 
+;
+.                        3600000      NS    C.ROOT-SERVERS.NET.
+C.ROOT-SERVERS.NET.      3600000      A     192.33.4.12
+C.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:2::c
+; 
+; FORMERLY TERP.UMD.EDU 
+;
+.                        3600000      NS    D.ROOT-SERVERS.NET.
+D.ROOT-SERVERS.NET.      3600000      A     199.7.91.13
+D.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:2d::d
+; 
+; FORMERLY NS.NASA.GOV
+;
+.                        3600000      NS    E.ROOT-SERVERS.NET.
+E.ROOT-SERVERS.NET.      3600000      A     192.203.230.10
+E.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:a8::e
+; 
+; FORMERLY NS.ISC.ORG
+;
+.                        3600000      NS    F.ROOT-SERVERS.NET.
+F.ROOT-SERVERS.NET.      3600000      A     192.5.5.241
+F.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:2f::f
+; 
+; FORMERLY NS.NIC.DDN.MIL
+;
+.                        3600000      NS    G.ROOT-SERVERS.NET.
+G.ROOT-SERVERS.NET.      3600000      A     192.112.36.4
+G.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:12::d0d
+; 
+; FORMERLY AOS.ARL.ARMY.MIL
+;
+.                        3600000      NS    H.ROOT-SERVERS.NET.
+H.ROOT-SERVERS.NET.      3600000      A     198.97.190.53
+H.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:1::53
+; 
+; FORMERLY NIC.NORDU.NET
+;
+.                        3600000      NS    I.ROOT-SERVERS.NET.
+I.ROOT-SERVERS.NET.      3600000      A     192.36.148.17
+I.ROOT-SERVERS.NET.      3600000      AAAA  2001:7fe::53
+; 
+; OPERATED BY VERISIGN, INC.
+;
+.                        3600000      NS    J.ROOT-SERVERS.NET.
+J.ROOT-SERVERS.NET.      3600000      A     192.58.128.30
+J.ROOT-SERVERS.NET.      3600000      AAAA  2001:503:c27::2:30
+; 
+; OPERATED BY RIPE NCC
+;
+.                        3600000      NS    K.ROOT-SERVERS.NET.
+K.ROOT-SERVERS.NET.      3600000      A     193.0.14.129
+K.ROOT-SERVERS.NET.      3600000      AAAA  2001:7fd::1
+; 
+; OPERATED BY ICANN
+;
+.                        3600000      NS    L.ROOT-SERVERS.NET.
+L.ROOT-SERVERS.NET.      3600000      A     199.7.83.42
+L.ROOT-SERVERS.NET.      3600000      AAAA  2001:500:9f::42
+; 
+; OPERATED BY WIDE
+;
+.                        3600000      NS    M.ROOT-SERVERS.NET.
+M.ROOT-SERVERS.NET.      3600000      A     202.12.27.33
+M.ROOT-SERVERS.NET.      3600000      AAAA  2001:dc3::35
+; End of file