Create a fixed width font with BMFont?

Hi,

I'm trying to create my own watchface. I picked a otf font for time and converted it to png and fnt with BMFont. The only issue is that otf font was not a fixed width font and number 1 is much more narrow. This does not look good. Perhaps there is an option to fix this in BMFont? Otherwise I guess I'm off for nightmare of manual editing png file and fnt offsets :(