Halo CE at 144fps?

Hello! So I’ve had the PC version of Halo CE for a long time, but I got a 144Hz monitor last month, and I attempted to utilize that monitor in halo. The highest refresh rate the settings let me go to was 120Hz, which don’t get me wrong, looks so much smoother than 60, but I just want to squeeze that last ounce of performance out of my monitor in this game, and haven’t figured out a way to do so. Is there like an .ini file or something I can edit to increase the refresh rate to 144Hz? or am I stuck at 120Hz max?

Thanks for the help!