Examples disclosed herein relate to an alternating current (AC) adapter. In one example, an AC adapter includes an adapter head with an arm extending from a first side of a surface of the adapter head towards a centerline of the first surface of the adapter head to secure a cable to the first surface of the adapter head. A housing body is coupled to the adapter head. The arm is deformable to be biased towards a first position to secure the cable between the arm and the first surface of the adapter head and flexed to a second position to allow an operator to insert the cable between the arm and the first surface of the adapter head.