Examples disclosed herein provide a system including a holder to secure a removable module. In one example, the removable module includes a plug comprising holes. The system further includes a receptacle mounted on a printed circuit board (PCB). As an example, the receptacle includes elastic members to make contact with the holes in the plug when the receptacle is to accommodate the plug of the removable module. As an example, the holder is slidable over the receptacle to constrain the elastic members of the receptacle to maintain contact with the holes in the plug of the removable module.