diff --git a/instances/heimdall/configuration.nix b/instances/heimdall/configuration.nix
index 22ac829..41e9301 100644
--- a/instances/heimdall/configuration.nix
+++ b/instances/heimdall/configuration.nix
@@ -101,7 +101,10 @@ in
       enable = true;
       settings = {
         homeassistant = config.services.home-assistant.enable;
-        mqtt.user = "zigbee2mqtt";
+        mqtt = {
+          user = "zigbee2mqtt";
+          password = "zigbee2mqtt";
+        };
         frontend.enabled = true;
         permit_join = true;
         serial = {