diff --git a/data/dns/blackcat.dn42 b/data/dns/blackcat.dn42
index 883dd63b2..3226766c6 100644
--- a/data/dns/blackcat.dn42
+++ b/data/dns/blackcat.dn42
@@ -3,7 +3,7 @@ admin-c:            ABLACKCATSTAIL-DN42
 tech-c:             ABLACKCATSTAIL-DN42
 mnt-by:             ABLACKCATSTAIL-MNT
 nserver:            ns1.blackcat.dn42 172.20.165.194
-nserver:            ns1.blackcat.dn42 fd0b:7449:62d2::2
+nserver:            ns1.blackcat.dn42 fd0b:7449:62d2::3
 nserver:            ns2.blackcat.dn42 172.20.165.195
-nserver:            ns2.blackcat.dn42 fd0b:7449:62d2::3
+nserver:            ns2.blackcat.dn42 fd0b:7449:62d2::4
 source:             DN42