diff --git a/it-syndikat.org.zone b/it-syndikat.org.zone
index 55f125e..5630bb5 100644
--- a/it-syndikat.org.zone
+++ b/it-syndikat.org.zone
@@ -2,7 +2,7 @@
 
 @	SOA	( ns0.it-syndikat.org.
 		  hostmaster.it-syndikat.org.
-		  1635384850 ; serial
+		  1635717583 ; serial
 		  3h ; refresh
 		  1h ; retry
 		  4w ; expire
@@ -49,6 +49,7 @@ www	CNAME	it-syndikat.org.
 parabox	A	85.10.196.35
 	AAAA	2a01:4f8:a0:6171::2
 	NS	parabox.it-syndikat.org.
+	NS	ns1.he.net.
 
 mailtrain	MX	10 mailtrain.it-syndikat.org.
 	A	85.10.196.35