Labour as a party with a relatively weak bargaining position must receive legal protection from the state. Justice for workers is a condition that ensures the continuity of their employment relationship status and justice for the welfare of workers. This study aims to provide an overview of the legal changes regarding the maximum time limit of a certain work agreement that changes the justice of legal certainty in Indonesia. This study used the descriptive qualitative method. This research is formative research on labour law in Indonesia. This study uses three approaches, namely: a legislative approach, a conceptual approach and a comparative approach. The information base of research has been formed through using documentation and literature studies on the problems that occur with changes in employment status in Indonesia. Data were analyzed using Miles and Huberman models, namely data reduction, data tabulation, data presentation and conclusion drawing. The study results indicate that the application of the new regulation on employment is less fair and prosperous for workers with a certain time work agreement. The research results are expected to be taken into consideration for related parties to prioritize the welfare of workers for a certain period to improve the standard of living of workers for a certain period.