diff --git a/hosts/hydra-1/configuration.nix b/hosts/hydra-1/configuration.nix
index 94dcb5d..9788887 100644
--- a/hosts/hydra-1/configuration.nix
+++ b/hosts/hydra-1/configuration.nix
@@ -23,10 +23,28 @@
   ];
 
   networking.useDHCP = false;
-  networking.interfaces.ens18.ipv6.addresses = [ { address = "2001:638:904:ffcb::a"; prefixLength = 64; } ];
-  networking.interfaces.ens19.ipv4.addresses = [ { address = "192.168.10.36"; prefixLength = 24; } ];
-  networking.defaultGateway6 = { address = "2001:638:904:ffcb::1"; interface = "ens18"; };
-  networking.defaultGateway = { address = "192.168.10.1"; interface = "ens19"; };
+  systemd.network.enable = true;
+
+  systemd.network.networks."10-wan" = {
+    matchConfig.Name = "ens18";
+    address = [
+      "2001:638:904:ffcb::a/64"
+    ];
+    routes = [
+      { Gateway = "2001:638:904:ffcb::1"; }
+    ];
+    linkConfig.RequiredForOnline = "routable";
+  };
+  systemd.network.networks."10-nat-netz-mercury" = {
+    matchConfig.Name = "ens19";
+    address = [
+      "192.168.10.36/24"
+    ];
+    routes = [
+      { Gateway = "192.168.10.1"; }
+    ];
+    linkConfig.RequiredForOnline = "routable";
+  };
 
   services.nginx.enable = true;