diff --git a/servers/kuribo/tranquil-pds.nix b/servers/kuribo/tranquil-pds.nix
index 91b3671..33dae05 100644
--- a/servers/kuribo/tranquil-pds.nix
+++ b/servers/kuribo/tranquil-pds.nix
@@ -23,8 +23,8 @@
         user_handle_domains = [ ".starhaven.dev" ];
         contact_email = "admin@starhaven.dev";
 
-        # Open registration (no invite required)
-        invite_code_required = false;
+        # Require invite code for registration
+        invite_code_required = true;
       };
 
       storage = {