diff --git a/modules/machine/raubahn/configuration.nix b/modules/machine/raubahn/configuration.nix
index 073d081..ddbb716 100644
--- a/modules/machine/raubahn/configuration.nix
+++ b/modules/machine/raubahn/configuration.nix
@@ -50,10 +50,10 @@
     firewall = {
       enable = true;
       tcpPorts = {
-        allowedPorts = [ 42420 ];
+        allowedPorts = [ 42421 ];
       };
       udpPorts = {
-        allowedPorts = [ 42420 ];
+        allowedPorts = [ 42421 ];
       };
     };
     networkManager.enable = true;