diff --git a/docker-compose.yml b/docker-compose.yml
index 57f2cfe..3a1a0c3 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,7 +9,7 @@ services:
       - '1883:1883'
       - '8883:8883'
     environment:
-      -  TZ: 'Europe/Lisbon'
+      - TZ: 'Europe/Lisbon'
       - MOSQUITTO_CONFIG_CONTENT: >
           listener 1883
           allow_anonymous true