The digital age challenges international law. The Internet is not a mere tool for information exchange anymore but plays an increasingly decisive role in modern international warfare and attacks. The encompassing interconnectivity is on the rise and, thereby, the number of possible vulnerabilities is growing. Therefore, the question arises how to address these situations legally. Attacks such as against Estonia, Georgia, and Sony Pictures demonstrate clearly the existing threat. According to Microsoft, the time is ripe for a new Digital Geneva Convention. The article scrutinises the necessity for a new international treaty and evaluates other proposals for the development of international law.