A method for shaping keratin fibers including providing a crosslinking composition, wherein the crosslinking composition includes ethylene carbonate, arabinose, a photocatalyst being a hydroxy-substituted aromatic compound, and a cosmetically acceptable carrier; applying the crosslinking composition to keratin fibers; and mechanically shaping the keratin fibers with an appliance at a temperature of from 80° C. to 180° C. while exposing the crosslinking composition to electromagnetic radiation having a wavelength of from 300 nm to 750 nm.