diff --git a/How-to-run-multiple-user-docker-daemons.md b/How-to-run-multiple-user-docker-daemons.md
index b716d4f..2aa197b 100644
--- a/How-to-run-multiple-user-docker-daemons.md
+++ b/How-to-run-multiple-user-docker-daemons.md
@@ -73,7 +73,7 @@ system-docker network create --subnet=172.20.0.0/16 dind
 
 ### Create OUD
 
-Just use `ros engine create`.
+Just use `ros engine create`. For the OUD image, currently only support docker `17.12.1` and `18.03.1`.
 
 ```
 ros engine create dind1 --network=dind --fixed-ip=172.20.0.2