diff --git a/docker-compose.yml b/docker-compose.yml
index 284b11e..e0058e6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -17,7 +17,7 @@ services:
     restart: unless-stopped
 
   broker:
-    image: eclipse-mosquitto
+    image: eclipse-mosquitto:1.6
     volumes:
       - broker_data:/mosquitto/data
       - ${CONFIG_DIR}:/mosquitto/config:ro