diff --git a/docker-compose.harmony.yml b/docker-compose.harmony.yml
index 7f153d41..64894d53 100644
--- a/docker-compose.harmony.yml
+++ b/docker-compose.harmony.yml
@@ -20,6 +20,7 @@ services:
       - "9500"
       - "9000"
       - "6000"
+      - "9900"
     ports:
       - 9000:9000/tcp
       - 6000:6000/tcp