diff --git a/test-python-ssh/Readme.md b/test-python-ssh/Readme.md
index c97c293..5380b39 100644
--- a/test-python-ssh/Readme.md
+++ b/test-python-ssh/Readme.md
@@ -7,7 +7,7 @@ This is a very experimental tool, **it may be working**. Any suggestion or PR is
 https://docs.docker.com/get-docker/
 
 ## Run it
-While in this file directory, open a terminal and run:
+While in this file directory, open a terminal and run the following command (the download can be very long…).
 ```
 docker run -it --name pythonsandbox --rm --network host -v "$(pwd)"/production_eleves:/app/python_app/modules -v "$(pwd)"/config:/app/config jeancloud/pythonsandbox
 ```