Evolution of the dust temperature as a function of IR luminosity (left panel) and redshift (right panel) for the galaxies with a Herschel counterpart. The ALMA detections are shown in red. By comparison, we also plot the dust temperatures of all the galaxies within the GOODS-ALMA field, color-coded by redshift (left panel) or IR luminosity (right panel). We show the sliding median (and the 1σ error) in black.