diff --git a/docker-compose.yml b/docker-compose.yml
index 8a5cad2..badea2f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -12,7 +12,7 @@ services:
       - AUTH_SECRET=${AUTH_SECRET}
       - NEXTAUTH_URL=${NEXTAUTH_URL:-http://localhost:3000}
       - NEXTAUTH_SECRET=${NEXTAUTH_SECRET}
-      - MQTT_BROKER_URL=mqtt://mosquitto:1883
+      - MQTT_BROKER_URL=${MQTT_BROKER_URL:-mqtt://mosquitto:1883}
       - MQTT_USERNAME=${MQTT_ADMIN_USERNAME:-admin}
       - MQTT_PASSWORD=${MQTT_ADMIN_PASSWORD:-admin}
       - MOSQUITTO_PASSWORD_FILE=/mosquitto/config/password.txt