diff --git a/kubejs/data/tfg/worldgen/placed_feature/mars/surface/large_skull_and_bones.json b/kubejs/data/tfg/worldgen/placed_feature/mars/surface/large_skull_and_bones.json
index 4ecfb4be3..5894c1f6a 100644
--- a/kubejs/data/tfg/worldgen/placed_feature/mars/surface/large_skull_and_bones.json
+++ b/kubejs/data/tfg/worldgen/placed_feature/mars/surface/large_skull_and_bones.json
@@ -25,7 +25,7 @@
 		},
 		{
 			"type": "minecraft:heightmap",
-			"heightmap": "WORLD_SURFACE"
+			"heightmap": "OCEAN_FLOOR"
 		}
 	]
 }
\ No newline at end of file
diff --git a/kubejs/data/tfg/worldgen/placed_feature/mars/surface/small_skull_and_bones.json b/kubejs/data/tfg/worldgen/placed_feature/mars/surface/small_skull_and_bones.json
index 9c17e8038..c52a6ff1b 100644
--- a/kubejs/data/tfg/worldgen/placed_feature/mars/surface/small_skull_and_bones.json
+++ b/kubejs/data/tfg/worldgen/placed_feature/mars/surface/small_skull_and_bones.json
@@ -25,7 +25,7 @@
 		},
 		{
 			"type": "minecraft:heightmap",
-			"heightmap": "WORLD_SURFACE"
+			"heightmap": "OCEAN_FLOOR"
 		}
 	]
 }
\ No newline at end of file