Is there a way to stop mobs spawning?

Hi there! I run a Starbound RP server currently, and we operate using a single hubworld that all the players are on at once. Recently (I presume due to the large number of players?) we have an issue with mobs spawning in huge clusters around the map, causing hell for server performance and being a massive nuisance. Is there any way mod or otherwise that I could disable the spawning of all mobs, either on the hub or entirely? Thanks in advance, guys!