- Update express from ^4.18.2 to ^5.0.0 - Update helmet from ^7.1.0 to ^8.0.0 - Update @types/express from ^4.17.21 to ^5.0.0 No code changes required - the gateway uses Express patterns fully compatible with v5 (standard middleware, req.body/query/params, res.json/redirect/status methods). Closes #6