diff --git a/docker-compose.yml b/docker-compose.yml
index 03e054d..bf93430 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,7 +7,10 @@ services:
       - '8883:8883'
     volumes:
       - 'data:/mosquitto/data/'
-      - 'mosquitto.conf:/mosquitto/config/mosquitto.conf'
+      - type: bind
+        source: ./mosquitto.conf
+        target: mosquitto/config/mosquitto.conf
+        read_only: true
     environment:
       TZ: 'Europe/Lisbon'
     restart: unless-stopped