diff --git a/README.md b/README.md
index 4d7de69..a5b738a 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ cd Strata2018
 source startup.sh
 ```
 
-You can now log in to RStudio Server at http://hostname:8787 (unlike JupyterHub, be sure to use http, not https).
+You can now log in to RStudio Server at http://hostname:8787 (unlike JupyterHub, be sure to use http, not https and replace the "hostname" with the hostname (the IP address of your virtual machine won't work !)).
 
 
 ## Abstract