It is well-documented that cyberbullying and victimization co-occur with traditional forms indicating that they share similar mechanisms. Therefore, it was hypothesized that the general antibullying program ViSC might also be effective in tackling these new forms of bullying. A longitudinal randomized control group design has been applied to examine the program effectiveness in 18 schools. In total, 2,042 students in Grades 5 to 7 (47.3% girls) aged 11.7 (SD = 0.9) attending 105 classes participated in the study. Utilizing a multiple group bivariate latent change score model controlling for traditional aggression, traditional victimization, and age, results demonstrate program effectiveness for cyberbullying (latent d = 0.39) and cyber victimization (latent d = 0.29) indicating that these behaviors reflect a systemic (school) problem.