diff --git a/generated_world/src/main/java/mc/world/generated_world/region/RegionImpl.java b/generated_world/src/main/java/mc/world/generated_world/region/RegionImpl.java
index 7c62c63..b61f053 100644
--- a/generated_world/src/main/java/mc/world/generated_world/region/RegionImpl.java
+++ b/generated_world/src/main/java/mc/world/generated_world/region/RegionImpl.java
@@ -47,7 +47,7 @@ public class RegionImpl implements Region{
 
     @Override
     public Biome getBiomeAt(int x, int z) {
-        if (x < 0 || z < 0 || x >= 16 || z >= 16) {
+        if (x < 0 || z < 0 || x >= 256 || z >= 256) {
             throw new RuntimeException(MessageFormat.format("Invalid biome coordinates [{0} {1}]", x, z));
         }
         return biomes[x][z];
@@ -55,7 +55,7 @@ public class RegionImpl implements Region{
 
     @Override
     public void setBiome(int x, int z, Biome biome) {
-        if (x < 0 || z < 0 || x >= 16 || z >= 16) {
+        if (x < 0 || z < 0 || x >= 256 || z >= 256) {
             throw new RuntimeException(MessageFormat.format("Invalid biome coordinates [{0} {1}]", x, z));
         }
         biomes[x][z] = biome;