INTRODUCTION: This article explores how securitisation theory is mobilised in contemporary social work discourse, policy and practice. We draw on recent child protection research to support our claim that a new practice issue, described previously as securitised safeguarding, has emerged.APPROACH: We demonstrate its emergence using securitisation theory as a conceptual mode of analysis to describe how a securitised safeguarding response depicts particular families as an existential threat which, in turn, prompts a response characterised by forms of muscular liberalism.CONCLUSIONS: We argue that this emerging practice issue requires critical consideration and suggest it will have a significant impact on social work – one that is unlikely to be beneficial for the profession and, more importantly, families being worked with. By describing a process of de-securitisation, we offer an alternative and more nuanced approach that perceives families holistically, and mobilises a welfare safeguarding model. This more closely resembles traditional social work values of emancipation, liberation and empowerment within social work practice.