diff --git a/doc/POST_UPGRADE.md b/doc/POST_UPGRADE.md
new file mode 100644
index 0000000..1f1bf2a
--- /dev/null
+++ b/doc/POST_UPGRADE.md
@@ -0,0 +1,3 @@
+- __APP__ can now be accessed at [https://__DOMAIN____PATH__](https://__DOMAIN____PATH__)
+- The admin username is: root
+- The admin password is: __ADMIN_PASS__
diff --git a/doc/POST_UPGRADE_fr.md b/doc/POST_UPGRADE_fr.md
new file mode 100644
index 0000000..21ba152
--- /dev/null
+++ b/doc/POST_UPGRADE_fr.md
@@ -0,0 +1,3 @@
+- __APP__ est désormais accessible sur [https://__DOMAIN____PATH__](https://__DOMAIN____PATH__)
+- Le nom d'utilisateur administrateur est : root
+- Le mot de passe administrateur est : __ADMIN_PASS__
diff --git a/scripts/upgrade b/scripts/upgrade
index fe1e409..30e1230 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,9 +21,6 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..."
 
-ynh_app_setting_delete --app=$app --key=admin_pass
-ynh_app_setting_delete --app=$app --key=admin_mail
-
 # If redis_db doesn't exist, create it
 if [ -z "${redis_db:-}" ]; then
 	redis_db=$(ynh_redis_get_free_db)