diff --git a/zones/xaviera.systems.zone b/zones/xaviera.systems.zone
index 61e74bb..fad416d 100644
--- a/zones/xaviera.systems.zone
+++ b/zones/xaviera.systems.zone
@@ -1,6 +1,6 @@
 $ORIGIN xaviera.systems.
 @			3600	IN SOA  ns3.k7dxs.net. admin.k7dxs.net. (
-				3	; serial
+				4	; serial
 				28800	; refresh (8 hours)
 				7200	; retry (2 hours)
 				2419200	; expire (4 weeks)
@@ -32,6 +32,7 @@ lester			3600	IN	A	65.101.184.219
 ; CNAMEs
 *.apps.okd0.i		3600	IN	CNAME	lester
 etherpad		3600	IN	CNAME	o1.i
+mumble			3600	IN	CNAME	o1.i
 nextcloud		3600	IN	CNAME	lester
 jellyfin		3600	IN	CNAME	lester