diff --git a/hosts/server7/containers/default.nix b/hosts/server7/containers/default.nix
index f1b83f0a..71f895fa 100644
--- a/hosts/server7/containers/default.nix
+++ b/hosts/server7/containers/default.nix
@@ -18,7 +18,7 @@ let
         autoStart = true;
         privateNetwork = true;
         hostBridge = "br0";
-        localAddress6 = "${yggaddr.prefix}:c3d2:${hextet0}:${hextet1}/64";
+        localAddress6 = "${yggaddr.prefix}:${hextet0}:${hextet1}:c3d2/64";
         # Generate a deterministic IPv6 address for the container.
         # This address is accessible within HQ and Yggdrasil but not from ARPANET.
         config = import (./. + "/${name}");
diff --git a/hosts/server7/yggaddr.nix b/hosts/server7/yggaddr.nix
index e8b77704..f5086928 100644
--- a/hosts/server7/yggaddr.nix
+++ b/hosts/server7/yggaddr.nix
@@ -1,4 +1,4 @@
 {
-  address = "21d:5658:8cee:eb54:d9b6:84e6:9ed8:f07c";
-  prefix = "31d:5658:8cee:eb54:";
+  address = "210:5217:69c0:9afc:1b95:b9f:8718:c3d2";
+  prefix = "310:5217:69c0:9afc:";
 }