diff --git a/src/com/garbagemule/MobArena/ArenaImpl.java b/src/com/garbagemule/MobArena/ArenaImpl.java
index c79440a..31be7de 100644
--- a/src/com/garbagemule/MobArena/ArenaImpl.java
+++ b/src/com/garbagemule/MobArena/ArenaImpl.java
@@ -194,6 +194,8 @@ public class ArenaImpl implements Arena
     @Override
     public void setWorld(World world) {
         this.world = world;
+        settings.set("world", world.getName());
+        settings.getParent().save();
         if (region != null) region.refreshWorld();
     }