The present invention provides liquid compositions comprising albiglutide or a variant thereof, a buffering agent, at least one saccharide and/or at least one polyol, at least one stabilizing agent and optionally a surfactant wherein said albiglutide remains stable in said liquid composition. Albiglutide or a variant thereof can be considered to remain stable in liquid if at least about ≥96% of said albiglutide or a variant thereof remains as a monomer in the liquid composition over a period of at least one week.