diff --git a/bremen.freifunk.net.zone b/bremen.freifunk.net.zone
index 0fcc60b..947d108 100644
--- a/bremen.freifunk.net.zone
+++ b/bremen.freifunk.net.zone
@@ -1,6 +1,6 @@
 $TTL 1D
 			IN	SOA	dns noc.bremen.freifunk.net. (
-				    2017072001	; Serial
+				    2018031601	; Serial
 				    4H		; Refresh
 				    1H		; Retry
 				    2W		; Expire