This thesis investigates the evolution of the European Neighbourhood Policy (ENP) towards Tunisia, particularly focusing on the impact of the Arab Spring on the bilateral relationship. The study aims to illuminate the complex interplay between normative objectives and security concerns that have shaped the EU’s foreign policy. By employing a qualitative case study methodology, it analyses the discourse of securitisation within ENP action plans, with an aim to elucidate the nuances of security discourse in EU-MENA relations. These action plans are the original 2004 ENP action plan, and the privileged 2013-2017 action plan. The findings reveal a shift in thematic focus from pre- to post-Arab Spring, particularly within the military sector, reflecting the changing global security landscape. The thesis also conducts a comprehensive literature review which underscores the influence of historical events, geopolitical realities, and ideological positions in shaping the ENP's approach towards Tunisia. The study acknowledges its limitation of primarily relying on ENP action plans, suggesting future research could benefit from examining direct communications from EU representatives. This work provides a valuable methodological and theoretical framework for future studies on EU-MENA relations, contributing to the broader understanding of how securitising speech impacts policy implementation and international cooperation.