diff --git a/src/main/java/org/ultramine/server/mobspawn/MobSpawnerMonsters.java b/src/main/java/org/ultramine/server/mobspawn/MobSpawnerMonsters.java
index f0dad81..6176c15 100644
--- a/src/main/java/org/ultramine/server/mobspawn/MobSpawnerMonsters.java
+++ b/src/main/java/org/ultramine/server/mobspawn/MobSpawnerMonsters.java
@@ -52,6 +52,8 @@
 		int y;
 		if(isDay)
 		{
+			if(topf <= 3)
+				return;
 			op = 0;
 			y = world.rand.nextInt(topf - 2);
 		}