diff --git a/Dockerfile b/Dockerfile
index 0eae151..e913389 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,3 +22,7 @@ EXPOSE 1883/tcp
 EXPOSE 8883/tcp
 EXPOSE 9001/tcp
 
+WORKDIR /opt
+
+CMD ["/opt/sbin/mosquitto", "-c", "/opt/etc/mosquitto/mosquitto.conf"]
+