Today, with news about HTML5, CSS3, etc.. and the importance of positioning on Internet, old websites are destined to fail, especially if they use technologies such as asp. In Yestilo, we are very concerned about the quality and continuity of the websites we make. So we accepted the first work to update websites completely redoing it but taking advantage of its content. Such is the case of the website for the Prevention of Occupational Hazards Act which together with other national type are updated during the last few weeks. They also change the server, moving to a new server Linux much more capable and powerful. In fact, we moved the entire structure of web data to free software, essential action on the Internet if you want optimum performance, stable and future-proof.