Multi-wavelength emission of blazar 4FGL J0013.9–1854 modelled using a one-zone SSC model and a 13 Gyr old elliptical galaxy template for the host. The fluxes used to reconstruct the SEDs are shown as coloured points. The synchrotron and SSC emission from the best-fit model (dashed grey line), the host galaxy emission (orange), the total intrinsic emission summing all components (solid green line), and the observed emission after accounting for EBL absorption (solid black line) are displayed.