diff --git a/containers/heisenbridge.nix b/containers/heisenbridge.nix
index aff2ce7..5d634a4 100644
--- a/containers/heisenbridge.nix
+++ b/containers/heisenbridge.nix
@@ -21,17 +21,18 @@ nglib.makeSystem {
                 -p 9898 \
                 -o @magic_rb:matrix.redalder.org \
               '';
+            homeserverURI = "https://matrix.redalder.org/";
           in
           pkgs.writeShellScript "heisenbridge"
             ''
               REGISTRATION_FILE="/var/lib/registrations/heisenbridge.yaml"
 
               [ -e "$REGISTRATION_FILE" ] || \
-                ${pkgs.heisenbridge}/bin/heisenbridge \
+                ${pkgs.heisenbridge}/bin/heisenbridge '${homeserverURI}' \
                   -c "$REGISTRATION_FILE" \
                   ${config} \
                   --generate
-              ${pkgs.heisenbridge}/bin/heisenbridge \
+              ${pkgs.heisenbridge}/bin/heisenbridge '${homeserverURI}' \
                   -c "$REGISTRATION_FILE" \
                   ${config}
             '';