diff --git a/scripts/upgrade b/scripts/upgrade
index 1a1f994..b70c7fb 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -16,11 +16,12 @@ ynh_script_progression --message="Loading installation settings..." --time --wei
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_app_setting_get --app=$app --key=path)
-language=$(ynh_app_setting_get --app=$app --key=language)
-admin=$(ynh_app_setting_get --app=$app --key=admin)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
+password=$(ynh_app_setting_get --app=$app --key=password)
+admin=$(ynh_app_setting_get --app=$app --key=admin)
+language=$(ynh_app_setting_get --app=$app --key=language)
 
 #=================================================
 # CHECK VERSION
@@ -42,15 +43,6 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
-#=================================================
-# STANDARD UPGRADE STEPS
-#=================================================
-# STOP SYSTEMD SERVICE
-#=================================================
-ynh_script_progression --message="Stopping a systemd service..." --time --weight=1
-
-ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
-
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -68,7 +60,7 @@ then
 	ynh_script_progression --message="Upgrading source files..." --time --weight=1
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$final_path"
+	ynh_setup_source --dest_dir="$final_path" --keep="$final_path/config.php"
 fi
 
 chmod 750 "$final_path"
@@ -98,14 +90,6 @@ ynh_script_progression --message="Upgrading PHP-FPM configuration..." --time --w
 # Create a dedicated PHP-FPM config
 ynh_add_fpm_config
 
-#=================================================
-# SETUP SYSTEMD
-#=================================================
-ynh_script_progression --message="Upgrading systemd configuration..." --time --weight=1
-
-# Create a dedicated systemd config
-ynh_add_systemd_config
-
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
@@ -116,7 +100,6 @@ ynh_script_progression --message="Upgrading logrotate configuration..." --time -
 # Use logrotate to manage app-specific logfile(s)
 ynh_use_logrotate --non-append
 
-#=================================================
 # RELOAD NGINX
 #=================================================
 ynh_script_progression --message="Reloading NGINX web server..." --time --weight=1