Provided is an adjustable barrier having a central hinge having a cylindrical post and an axis of rotation; a first expandable section coupled to the cylindrical post of the central hinge by at least a first connector; a second expandable section coupled to the cylindrical post of the central hinge by at least a second connector; and a hinge lock. At least one of the first and second expandable sections is configured to articulate around the axis of rotation of the central hinge forming an articulation angle between the first and second expandable sections. When the first and second expandable sections are aligned within a single vertical plane, a spring button of the cylindrical post is received within an aperture of at least one of the first and second connectors preventing articulation around the axis of rotation.