The phenomenon of Internet addiction has been systematically addressed with numerous studies highlighting its association with deficits in self-regulation. Despite the extensive literature elucidating the adverse effects of Internet addiction on university students, the availability of relevant interventions has remained constrained. The current study aimed at evaluating a web-based, group intervention, which aimed to prevent Internet addiction and enhance self-regulation. The sample consisted of 47 undergraduate and postgraduate university students (Ν = 47, Mage=21, SD = 3), who were divided into an intervention (n = 24) and a control group (n = 23). The participants were asked to complete a) the Internet Addiction Test (Young, 1998), and b) the Self-Regulation Questionnaire (Brown et al., 1999), prior to the commencement of the intervention, after its conclusion, and one and a half months after the intervention. The web-based intervention consisted of 6 sessions, over a two-week period. Results indicated an improvement of self-regulation and Internet addiction levels for the intervention group, compared to the control group. These results were maintained at the one and a half months follow-up. Implications for designing and implementing web-based group interventions for Internet addiction are discussed.