Making colorbar's tick labels integer

Hi,
How can I make colorbar’s tick labels integer. This colorbar has tick labels in float form?

ropts= dict( tools=['hover'], colorbar=True,colorbar_position='bottom', cmap=cc.fire, cnorm='eq_hist')
rasterized =  dynspread(  rasterize(points, x_sampling=1, y_sampling=1, width=1200, height=800).opts(**ropts)

regards