diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index 6194b16e..02e2afb1 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -2008,7 +2008,7 @@ local function register_dimension_ores()
 		clust_scarcity  = 26 * 26 * 26,
 		clust_size      = 5,
 		y_min           = mcl_vars.mg_lava_nether_max + 10,
-		y_max           = mcl_vars.mg_nether_max,
+		y_max           = mcl_vars.mg_bedrock_nether_top_max - 1,
 		noise_threshold = 0.0,
 		noise_params    = {
 			offset = 0.5,
@@ -2052,7 +2052,7 @@ local function register_dimension_ores()
 			clust_num_ores = 4, -- MC cluster amount: 4-10
 			clust_size     = 3,
 			y_min = mcl_vars.mg_nether_min,
-			y_max = mcl_vars.mg_nether_max,
+			y_max = mcl_vars.mg_bedrock_nether_top_max - 1,
 		})
 		minetest.register_ore({
 			ore_type       = "scatter",
@@ -2062,7 +2062,7 @@ local function register_dimension_ores()
 			clust_num_ores = 8, -- MC cluster amount: 4-10
 			clust_size     = 4,
 			y_min = mcl_vars.mg_nether_min,
-			y_max = mcl_vars.mg_nether_max,
+			y_max = mcl_vars.mg_bedrock_nether_top_max - 1,
 		})
 	end
 
@@ -2107,7 +2107,7 @@ local function register_dimension_ores()
 		clust_num_ores = 1,
 		clust_size     = 1,
 		y_min           = mcl_vars.mg_lava_nether_max + 49,
-		y_max           = mcl_vars.mg_nether_max,
+		y_max           = mcl_vars.mg_bedrock_nether_top_max - 1,
 	})
 
 	--[[ THE END ]]