diff --git a/slaves/lantian b/slaves/lantian
index ae6c679..f68bd46 100644
--- a/slaves/lantian
+++ b/slaves/lantian
@@ -1,4 +1,4 @@
-fdbc:f9dc:67ad:1::54 dns-authoritative.gigsgigscloud.lantian.dn42
-fdbc:f9dc:67ad:2::54 dns-authoritative.virtono.lantian.dn42
-fdbc:f9dc:67ad:3::54 dns-authoritative.hostdare.lantian.dn42
-fdbc:f9dc:67ad:8::54 dns-authoritative.virmach-ny1g.lantian.dn42
+fdbc:f9dc:67ad:1::55 dns-authoritative-backend.gigsgigscloud.lantian.dn42
+fdbc:f9dc:67ad:2::55 dns-authoritative-backend.virtono.lantian.dn42
+fdbc:f9dc:67ad:3::55 dns-authoritative-backend.hostdare.lantian.dn42
+fdbc:f9dc:67ad:8::55 dns-authoritative-backend.virmach-ny1g.lantian.dn42