diff --git a/docker-compose.yml b/docker-compose.yml
index 2bd403c..3ea1319 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -10,10 +10,7 @@ services:
       - '8883:8883'
     environment:
       - TZ= Europe/Lisbon
-      - |
-        MOSQUITTO_CONFIG_CONTENT= 
-        listener 1883 
-        allow_anonymous true 
+      - MOSQUITTO_CONFIG_CONTENT=${MOSQUITTO_CONFIG_CONTENT}
     volumes:
       - data:/mosquitto/data
     restart: unless-stopped