diff --git a/ops/nixos/bvm-matrix/default.nix b/ops/nixos/bvm-matrix/default.nix
index ab4156f4de..3dc5cacc18 100644
--- a/ops/nixos/bvm-matrix/default.nix
+++ b/ops/nixos/bvm-matrix/default.nix
@@ -111,6 +111,10 @@ in {
               server_name = "matrix.zxcvbnm.ninja";
             };
             disable_guests = true;
+            disable_custom_urls = true;
+            settingDefaults = {
+              "UIFeature.registration" = false;
+            };
           };
         };
       };