In the digital era, the right strategy is needed to improve teacher competence. Teacher competencies include personal, social, pedagogical and professional competencies. The goal of this research is to describe how the headmaster of SMA Negeri 2 OKU's strategies for increasing teachers' professional competence. This is a descriptive qualitative study. Data collection methods include observation, interviews, and documentation. The data analysis process was divided into three stages: data reduction, presentation, and conclusion. According to the findings of the study, the principal's strategy for improving the professional competence of teachers at SMA Negeri 2 OKU is twofold. There are two types of strategies: formal and informal. The formal strategy is carried out directly by the principal, while the informal strategy is based on teacher awareness and is supported by the principal. The formal strategy is in the form of direct coaching by the principal, sending teachers to take part in self-development activities, providing support facilities for increasing teacher professional competence, providing continuing teacher education qualifications. The informal strategy is to increase discipline and motivate teachers. This strategy was successful in SMA Negeri 2 OKU in increasing the professional competence of teachers. So far, professional teachers are identical with educational qualifications, but this can be overcome by self-development. The principal's self-development strategy entails assigning teachers to participate in various trainings and workshops.