diff --git a/domains/bremen.conf b/domains/bremen.conf
index 14e65da839a15acc9e04811430bb36eb11e25510..5b0d453045b4f05c86f439c6dbb7ec2864cba5f3 100644
--- a/domains/bremen.conf
+++ b/domains/bremen.conf
@@ -2,7 +2,7 @@
 	domain_names = { bremen = 'Bremen' },
 	domain_seed = 'da213cd742af54c91a6840f381ab8aaaf9ed0b5ff175f88175c76c07e85872ba',
 
-	prefix6 = '',
+	prefix6 = '2a03:2260:1001:4830::/64',
 	extra_prefixes6 = { 'fd74:fdaa:9dc4::/64' },
 	prefix4 = '10.72.48.0/21',