Is there any way to tune down mob spawning?

I’m running a modded survival server for me and my friends but even on game difficulty easy loads of mobs spawn. This is seriously getting annoying because we can’t even walk out of our house without getting killed by a skeleton or having our terrain ruined by creepers.


Dont quote me on this (unless its right), but I believe it is in the following folder.


And its on a per world basis