During March 2025, Antoine Brones focused on dependency management and frontend development for the betagouv/mon-service-securise repository. He upgraded the UI Kit from version 1.2.2 to 1.3.2, ensuring the application remained aligned with the latest design system requirements without introducing functional changes. Working primarily with Pug and frontend build tools, Antoine validated that the upgrade preserved UI and UX consistency, maintaining stability and compatibility across the project. This work reduced dependency risk and established a foundation for future UI enhancements. The scope was limited to a single feature, reflecting a targeted, business-driven approach with no bug fixes during the period.