diff --git a/systems/palatine-hill/firewall.nix b/systems/palatine-hill/firewall.nix
index 8feeb16..047bcde 100644
--- a/systems/palatine-hill/firewall.nix
+++ b/systems/palatine-hill/firewall.nix
@@ -48,6 +48,9 @@
 
       # torr
       29432
+
+      # mattermost
+      8065
     ];
 
     allowedUDPPorts = [