diff --git a/scripts/install b/scripts/install
index 8726bec..cb2c5a1 100644
--- a/scripts/install
+++ b/scripts/install
@@ -219,7 +219,9 @@ ynh_script_progression --message="Sending a readme for the admin..." --weight=1
 
 message="CryptPad was successfully installed :)
 
-Please open your $app domain: https://$domain$path_url
+We have added a sandbox domain for you but you still need to configure your DNS and generate Let's Encrypt Certificates for it.
+
+Then you can please open your $app domain: https://$domain$path_url
 Create an account via the Register button on the home page. To make this account an instance administrator:
 
 1. Copy the public key found in User Menu (avatar at the top right) > Settings > Account > Public Signing Key