diff --git a/docker-compose.yml b/docker-compose.yml
index f67ccae..daefb58 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -65,7 +65,7 @@ services:
       sh -c '
         if [ ! -f /mosquitto/config/passwd ]; then
           echo "Creating MQTT user";
-          mosquitto_passwd -b /mosquitto/config/passwd "$MQTT_USER" "$MQTT_PASS";
+          mosquitto_passwd -c -b /mosquitto/config/passwd "$MQTT_USER" "$MQTT_PASS";
           chmod 600 /mosquitto/config/passwd;
         fi &&
         exec mosquitto -c /mosquitto/config/mosquitto.conf