diff --git a/build.properties b/build.properties
index ef6523ca..8568edde 100644
--- a/build.properties
+++ b/build.properties
@@ -1,7 +1,7 @@
 minecraft.version=1.10.2
 forge.version=12.18.1.2079
 
-gt.version=5.09.22
+gt.version=5.10.04
 
 forestry.version=5.2.7.220
 ic2.version=2.6.9-ex110
diff --git a/src/main/java/gregtech/common/GT_Worldgenerator.java b/src/main/java/gregtech/common/GT_Worldgenerator.java
index 711ac9d3..6650e913 100644
--- a/src/main/java/gregtech/common/GT_Worldgenerator.java
+++ b/src/main/java/gregtech/common/GT_Worldgenerator.java
@@ -44,11 +44,13 @@ public class GT_Worldgenerator implements IWorldGenerator {
 
     @Override
     public void generate(Random aRandom, int aX, int aZ, World aWorld, IChunkGenerator aChunkGenerator, IChunkProvider aChunkProvider) {
-        Biome biome = aWorld.getBiomeGenForCoords(new BlockPos(aX * 16 + 8, 16, aZ * 16 + 8));
-        new WorldGenContainer(new Random(aRandom.nextInt()), aX * 16, aZ * 16,
-                (aChunkGenerator instanceof ChunkProviderEnd || biome == Biomes.SKY) ? 1 :
-                        (aChunkGenerator instanceof ChunkProviderHell || biome == Biomes.HELL) ? -1 : 0,
-                aWorld, aChunkGenerator, aChunkProvider, biome.getBiomeName()).run();
+        if(aRandom.nextInt(3) == 0) {
+            Biome biome = aWorld.getBiomeGenForCoords(new BlockPos(aX * 16 + 8, 16, aZ * 16 + 8));
+            new WorldGenContainer(aRandom, aX * 16, aZ * 16,
+                    (aChunkGenerator instanceof ChunkProviderEnd || biome == Biomes.SKY) ? 1 :
+                            (aChunkGenerator instanceof ChunkProviderHell || biome == Biomes.HELL) ? -1 : 0,
+                    aWorld, aChunkGenerator, aChunkProvider, biome.getBiomeName()).run();
+        }
     }
 
     public static class WorldGenContainer