diff --git a/site.conf b/site.conf
index e67d15f..f2f2027 100644
--- a/site.conf
+++ b/site.conf
@@ -4,7 +4,7 @@
     site_code = 'tdf-',
     opkg_repo = 'http://openwrt.draic.info/barrier_breaker/14.07/%S/packages',
     prefix4 = '10.188.0.0/19',
-    prefix6 = '2a03:2260:121:0001::/64',
+    prefix6 = '2a03:2260:121:4000::/64',
     timezone = 'CET-1CEST,M3.5.0,M10.5.0/3', -- Europe/Berlin
     ntp_servers = {
         'ntp1.infra.fftdf',
@@ -35,7 +35,7 @@
     },
     next_node = {
         ip4 = '10.188.0.1',
-        ip6 = '2a03:2260:121:0001::1',
+        ip6 = '2a03:2260:121:4000::1',
         mac = '04:74:05:d0:4f:aa',
     },
     mesh = {