diff --git a/code/datums/mapgen/Cavegens/IcemoonCaves.dm b/code/datums/mapgen/Cavegens/IcemoonCaves.dm
index 3e7b104c726..8e2e1d714d2 100644
--- a/code/datums/mapgen/Cavegens/IcemoonCaves.dm
+++ b/code/datums/mapgen/Cavegens/IcemoonCaves.dm
@@ -13,6 +13,7 @@
 /datum/map_generator/cave_generator/icemoon/surface
 	flora_spawn_chance = 4
 	mob_spawn_list = null
-	initial_closed_chance = 40
+	initial_closed_chance = 53
 	birth_limit = 5
 	death_limit = 4
+	smoothing_iterations = 10