The COVID-19 pandemic exposed failings in preparedness and response across the world and a shortfall in global health security. The crisis also highlighted shortcomings in global and regional legal frameworks, including the International Health Regulations (2005) and relevant European Union law, as well as in national public health legislation and emergency plans. Lessons learned from the pandemic converge around strengthening preparedness and response capacities at all levels, with special attention to be paid to legal preparedness, a critical component of public health emergency preparedness. Improving legal capacities at country level is one of the strategic priorities set by the Global Health Security Agenda (GHSA), which established a new Legal Preparedness Action Package (LP AP) in order to elevate attention to and the importance of legal preparedness worldwide. Since 2021 the LP AP has been front and centre in international efforts to bridge the legal preparedness gap at national level. In bringing together technical experts in global health law and government health policy officials from a broad range of countries and partners, the LP AP seeks to set a foundation for legal preparedness by developing technical and capacity-building tools, legal guidelines, policy briefs, information and training. This article aims to illustrate and contextualize the work of the GHSA LP AP and raise awareness about the importance of its contribution to enhanced global health security. It also intends to highlight how its work promotes and develops synergies with parallel initiatives, processes and tools, facilitates regime interaction and harmonization of technical assistance and ultimately ensures consistency of action, methodology and approaches.