diff --git a/common/src/main/java/bisq/common/crypto/Equihash.java b/common/src/main/java/bisq/common/crypto/Equihash.java
index d78e13315b..e8eec1697d 100644
--- a/common/src/main/java/bisq/common/crypto/Equihash.java
+++ b/common/src/main/java/bisq/common/crypto/Equihash.java
@@ -42,6 +42,7 @@ import java.util.Iterator;
 import java.util.NoSuchElementException;
 import java.util.Optional;
 import java.util.PrimitiveIterator;
+import java.util.stream.IntStream;
 
 import lombok.ToString;
 
@@ -244,15 +245,11 @@ public class Equihash {
         }
 
         private XorTable computeAllHashes() {
-            var tableValues = ImmutableIntArray.builder((k + 2) * N);
-            for (int i = 0; i < N; i++) {
+            var tableValues = IntStream.range(0, N).flatMap(i -> {
                 int[] hash = hashInputs(i);
-                for (int j = 0; j <= k; j++) {
-                    tableValues.add(hash[j] & (N / 2 - 1));
-                }
-                tableValues.add(i);
-            }
-            return new XorTable(k + 1, 1, tableValues.build());
+                return IntStream.range(0, k + 2).map(j -> j <= k ? hash[j] & (N / 2 - 1) : i);
+            });
+            return new XorTable(k + 1, 1, ImmutableIntArray.copyOf(tableValues.parallel()));
         }
 
         private boolean testDifficultyCondition(int[] inputs) {
diff --git a/common/src/main/java/bisq/common/util/Utilities.java b/common/src/main/java/bisq/common/util/Utilities.java
index 7e665833c1..fca323ab4c 100644
--- a/common/src/main/java/bisq/common/util/Utilities.java
+++ b/common/src/main/java/bisq/common/util/Utilities.java
@@ -20,6 +20,7 @@ package bisq.common.util;
 import org.bitcoinj.core.Utils;
 
 import com.google.common.base.Splitter;
+import com.google.common.primitives.Ints;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.ListeningExecutorService;
 import com.google.common.util.concurrent.MoreExecutors;
@@ -42,7 +43,6 @@ import java.text.DecimalFormat;
 import java.net.URI;
 import java.net.URISyntaxException;
 
-import java.nio.ByteBuffer;
 import java.nio.file.Paths;
 
 import java.io.File;
@@ -536,13 +536,21 @@ public class Utilities {
 
     public static byte[] intsToBytesBE(int[] ints) {
         byte[] bytes = new byte[ints.length * 4];
-        ByteBuffer.wrap(bytes).asIntBuffer().put(ints);
+        int i = 0;
+        for (int v : ints) {
+            bytes[i++] = (byte) (v >> 24);
+            bytes[i++] = (byte) (v >> 16);
+            bytes[i++] = (byte) (v >> 8);
+            bytes[i++] = (byte) v;
+        }
         return bytes;
     }
 
     public static int[] bytesToIntsBE(byte[] bytes) {
         int[] ints = new int[bytes.length / 4];
-        ByteBuffer.wrap(bytes).asIntBuffer().get(ints);
+        for (int i = 0, j = 0; i < bytes.length / 4; i++) {
+            ints[i] = Ints.fromBytes(bytes[j++], bytes[j++], bytes[j++], bytes[j++]);
+        }
         return ints;
     }