diff --git a/docker-compose/device-observation.yml b/docker-compose/device-observation.yml
index f0017a898f1db0efb25095b9e707e7fc30552ddb..28beae49945ced6526648893b81eb57783aeb2f8 100644
--- a/docker-compose/device-observation.yml
+++ b/docker-compose/device-observation.yml
@@ -29,7 +29,7 @@ services:
     networks:
       - control
     ports:
-      - "5717:5717" # unique port for this DS
+      - "5718:5718" # unique port for this DS
     extra_hosts:
       - "host.docker.internal:host-gateway"
     volumes:
@@ -41,5 +41,5 @@ services:
       - bin/start-ds.sh
       # configure CORBA to _listen_ on 0:port, but tell others we're _reachable_ through ${HOSTNAME}:port, since CORBA
       # can't know about our Docker port forwarding
-      - l2ss-observation Observation STAT -v -ORBendPoint giop:tcp:0:5717 -ORBendPointPublish giop:tcp:${HOSTNAME}:5717
+      - l2ss-observation Observation STAT -v -ORBendPoint giop:tcp:0:5718 -ORBendPointPublish giop:tcp:${HOSTNAME}:5718
     restart: unless-stopped