diff --git a/pom.xml b/pom.xml
index 52f7483d..065d3c2f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,8 +47,8 @@
                     <debuglevel>lines,vars,source</debuglevel> <!-- required to make structs work -->
                     <optimize>false</optimize>
                     <verbose>true</verbose>
-                    <source>20</source>
-                    <target>20</target>
+                    <source>21</source>
+                    <target>21</target>
                     <encoding>UTF-8</encoding>
                     <compilerArgs>
                         <arg>--enable-preview</arg>
diff --git a/src/main/java/org/nustaq/offheap/bytez/malloc/MMFBytez.java b/src/main/java/org/nustaq/offheap/bytez/malloc/MMFBytez.java
index 036ba734..2a2b6525 100644
--- a/src/main/java/org/nustaq/offheap/bytez/malloc/MMFBytez.java
+++ b/src/main/java/org/nustaq/offheap/bytez/malloc/MMFBytez.java
@@ -19,7 +19,7 @@
 import java.io.RandomAccessFile;
 
 import java.io.File;
-import java.lang.foreign.SegmentScope;
+import java.lang.foreign.Arena;
 import java.nio.channels.FileChannel;
 
 /**
@@ -28,7 +28,7 @@
  */
 public class MMFBytez extends MemoryBytez {
     private File file;
-    private SegmentScope scope;
+    private Arena scope;
 
     public MMFBytez(String filePath, long length, boolean clearFile) throws Exception {
         init(filePath, length, clearFile);
@@ -44,7 +44,7 @@ protected void init(String file, long length, boolean clearFile) throws Exceptio
             f.createNewFile();
         }
 
-        scope = SegmentScope.auto();
+        scope = Arena.ofAuto();
         memseg = new RandomAccessFile(f, "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, length, scope);
 ///        memseg = MemorySegment.mapFile(f.toPath(), 0, length, FileChannel.MapMode.READ_WRITE, scope);
         this.file = f;
diff --git a/src/main/java/org/nustaq/offheap/bytez/malloc/MemoryBytez.java b/src/main/java/org/nustaq/offheap/bytez/malloc/MemoryBytez.java
index ee988408..c7624047 100644
--- a/src/main/java/org/nustaq/offheap/bytez/malloc/MemoryBytez.java
+++ b/src/main/java/org/nustaq/offheap/bytez/malloc/MemoryBytez.java
@@ -20,9 +20,6 @@
 import org.nustaq.offheap.bytez.BasicBytez;
 import org.nustaq.offheap.bytez.Bytez;
 
-import java.lang.invoke.VarHandle;
-import java.nio.ByteOrder;
-
 /**
  * Date: 17.11.13
  * Time: 00:01
@@ -37,7 +34,9 @@ public class MemoryBytez implements Bytez {
     protected MemoryBytez() {}
 
     public MemoryBytez(long len) {
-        memseg = MemorySegment.allocateNative(len, SegmentScope.auto());
+        try (Arena arena = Arena.ofConfined()) {
+            memseg = arena.allocate(len);
+        }
     }
 
     public MemoryBytez(MemorySegment mem) {