diff --git a/core/src/main/java/com/volmit/iris/util/mantle/Mantle.java b/core/src/main/java/com/volmit/iris/util/mantle/Mantle.java
index 011e9b47e..7b101cd2f 100644
--- a/core/src/main/java/com/volmit/iris/util/mantle/Mantle.java
+++ b/core/src/main/java/com/volmit/iris/util/mantle/Mantle.java
@@ -110,7 +110,7 @@ public class Mantle {
      * @return the file
      */
     public static File fileForRegion(File folder, Long key) {
-        File f = new File(folder, "p." + key + ".ttp.lz4");
+        File f = new File(folder, "p." + key + ".ttp.lz4b");
         if (!f.getParentFile().exists()) {
             f.getParentFile().mkdirs();
         }
@@ -552,7 +552,7 @@ public class Mantle {
 
             File file = fileForRegion(dataFolder, x, z);
             if (!file.exists())
-                file = new File(dataFolder, file.getName().substring(".lz4".length()));
+                file = new File(dataFolder, file.getName().substring(".lz4b".length()));
 
             if (file.exists()) {
                 try {
diff --git a/core/src/main/java/com/volmit/iris/util/mantle/TectonicPlate.java b/core/src/main/java/com/volmit/iris/util/mantle/TectonicPlate.java
index a93cb9c4d..87d049b36 100644
--- a/core/src/main/java/com/volmit/iris/util/mantle/TectonicPlate.java
+++ b/core/src/main/java/com/volmit/iris/util/mantle/TectonicPlate.java
@@ -27,6 +27,7 @@ import com.volmit.iris.util.format.Form;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
 import lombok.Getter;
 import net.jpountz.lz4.LZ4BlockInputStream;
+import net.jpountz.lz4.LZ4BlockOutputStream;
 import net.jpountz.lz4.LZ4FrameInputStream;
 import net.jpountz.lz4.LZ4FrameOutputStream;
 
@@ -87,7 +88,7 @@ public class TectonicPlate {
             GZIPInputStream gzi = new GZIPInputStream(fin);
             din = new DataInputStream(gzi);
         } else {
-            LZ4FrameInputStream lz4 = new LZ4FrameInputStream(fin);
+            LZ4BlockInputStream lz4 = new LZ4BlockInputStream(fin);
             din = new DataInputStream(lz4);
         }
         TectonicPlate p = new TectonicPlate(worldHeight, din);
@@ -178,7 +179,7 @@ public class TectonicPlate {
             GZIPOutputStream gzo = new GZIPOutputStream(fos);
             dos = new DataOutputStream(gzo);
         } else {
-            LZ4FrameOutputStream lz4 = new LZ4FrameOutputStream(fos);
+            LZ4BlockOutputStream lz4 = new LZ4BlockOutputStream(fos);
             dos = new DataOutputStream(lz4);
         }
         write(dos);