diff --git a/scripts/change_url b/scripts/change_url
index 3ae2239..9028263 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -33,6 +33,7 @@ db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
 db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
 secret=$(ynh_string_random --length=32)
+timezone="$(cat /etc/timezone)"
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP