diff --git a/salt/bird/bird6.conf b/salt/bird/bird6.conf
index c55cc96..da8b15b 100644
--- a/salt/bird/bird6.conf
+++ b/salt/bird/bird6.conf
@@ -56,7 +56,7 @@ protocol ospf ZW6 {
 {%- endif %}
          area 0 {
               networks {
-                       fd23:42:c3d2:500::/57;
+                       fd23:42:c3d2:500::/56;
                        2a02:8106:208:5200::/56;
                        2a02:8106:211:e900::/56;
               };
@@ -84,7 +84,7 @@ protocol ospf ZW6 {
 {%- if pillar.get('bgp') %}
 protocol static {
         # Zentralwerk DN42
-        route fd23:42:c3d2:580::/56 unreachable;
+        route fd23:42:c3d2:580::/57 unreachable;
         # Static Kabeldeutschland
         route 2a02:8106:208:5280::/57 unreachable;
         route 2a02:8106:211:e900::/56 unreachable;