diff --git a/scripts/upgrade b/scripts/upgrade
index 3f8ff5a..8f1af16 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -21,7 +21,11 @@ path_url=$(ynh_app_setting_get --app=$app --key=path)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 port=$(ynh_app_setting_get --app=$app --key=port)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 datadir=$(ynh_app_setting_get --app=$app --key=datadir)
+admin=$(ynh_app_setting_get --app=$app --key=admin)
+password=$(ynh_app_setting_get --app=$app --key=password)
+timezone="$(cat /etc/timezone)"
 
 #=================================================
 # CHECK VERSION
@@ -94,6 +98,16 @@ ynh_script_progression --message="Installing dependencies..." --weight=12
 
 ynh_install_nodejs --nodejs_version=$nodejs_version
 
+#=================================================
+# UPGRADE A CONFIGURATION FILE
+#=================================================
+ynh_script_progression --message="Upgrade a configuration file..." --weight=1
+
+ynh_add_config --template="../conf/.env" --destination="$final_path/.env"
+
+chmod 400 "$final_path/.env"
+chown $app:$app "$final_path/.env"
+
 #=================================================
 # SETUP SYSTEMD
 #=================================================