The CyberPeace Institute co-led Paris Call Working Group 5 on Building a Cyberstability Index with colleagues from GEODE (Géopolitique de la Datasphère) and the Hague Centre for Strategic Studies (HCSS). In November 2021 the Working Group published its final report which presents a methodology to understand how the implementation of normative, legal, operational and technical measures, or the lack thereof, contribute to stability in cyberspace and ultimately to cyberpeace. It also outlines various key findings and challenges that emerged throughout the process, such as the lack of accessible data relating to cyberstability.