How to Change the Zombie Villager Spawn Chance from Zombie Spawners

Finding the Config File

After installing the mod, launch Minecraft once so the mod can generate its configuration file. Close the game, then open your modpack or game instance folder and look inside the config directory. The mod creates its own config file there (its name matches the mod). Open it with any plain text editor.

Editing the Probability Value

Inside the config you will find a single setting that controls the spawn probability. It is expressed as a percentage and accepts any value from 0% up to 100%. Set it to the number you want — for example, a low value keeps zombie villagers rare, while a high value makes them common. Save the file and restart Minecraft so the new value is loaded.

Verifying the Change

Load a world and find a zombie spawner (dungeons are the easiest source). Stand in range and let zombies spawn. With a higher configured chance you should see zombie villagers appear among the regular zombies noticeably more often. If nothing seems different, double-check that you edited the correct config file and that the value was saved before relaunching. Setting the chance to 0% disables zombie villager spawns entirely, and 100% makes every spawner-spawned zombie a villager variant.