  We present an experimental study of the superconducting properties of NiBi3
as a function of pressure by means of resistivity and magnetization
measurements and combine our results with DFT calculations of the band
structure under pressure. We find a moderate suppression of the critical
temperature Tc from ~ 4.1K to ~ 3K by pressures up to 2GPa. By taking into
account the change of the band structure as a function of pressure, we argue
that the decrease in Tc is consistent with conventional,
electron-phonon-mediated BCS-type superconductivity.
