Sobec – Contao Upgrade 3.5 → 5.3 LTS
Professional upgrade of an existing Contao installation from the outdated version 3.5 to the current 5.3 LTS.
Project Overview
- Client: Sobec
- Year: 2025
- Technology: Contao CMS, PHP, MySQL
Challenge
Upgrading across two major versions is demanding: templates, extensions and database structure must be migrated without downtime or functionality loss.
Solution
- Careful planning and preparation of the migration
- Step-by-step update of all Contao components
- Template adaptation for the new version
- Comprehensive testing before go-live
- Minimal downtime during the transition
Result
The website now runs on the latest Contao LTS version with full security support and new features.