diff --git a/gradle.properties b/gradle.properties
index b751ef73..a4c95ffc 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,7 +8,7 @@ yarn_mappings=6
 loader_version=0.11.3
 
 # Mod Properties
-mod_version = 0.1.40
+mod_version = 0.1.41
 maven_group = ru.bclib
 archives_base_name = bclib
 
diff --git a/src/main/java/ru/bclib/api/BiomeAPI.java b/src/main/java/ru/bclib/api/BiomeAPI.java
index f311c862..ef927ef8 100644
--- a/src/main/java/ru/bclib/api/BiomeAPI.java
+++ b/src/main/java/ru/bclib/api/BiomeAPI.java
@@ -41,7 +41,7 @@ public class BiomeAPI {
 	}
 	
 	public static void registerBiome(BCLBiome biome) {
-		if (!BuiltinRegistries.BIOME.containsKey(biome.getID())) {
+		if (BuiltinRegistries.BIOME.get(biome.getID()) == null) {
 			Registry.register(BuiltinRegistries.BIOME, biome.getID(), biome.getBiome());
 		}
 		ID_MAP.put(biome.getID(), biome);