Change of the slope of the dust attenuation law with respect to Calzetti (δ) as a function of stellar mass. The different colors show each stacking analysis as a function of β_UV and M_*, and the combination of both parameters (LBG-β, LBG-M, LBG-Mβ1, and LBG-Mβ2). This suggests a correlation between the stellar mass of a galaxy and the shape of the dust attenuation curve, which is steeper for LBGs with log(M_* [M_⊙]) <  10.25 and grayer for LBGs with log(M_* [M_⊙]) >  10.25 than Calzetti’s law.