diff --git a/arithmetic/build.gradle b/arithmetic/build.gradle
index fdabb730..a81e96c9 100644
--- a/arithmetic/build.gradle
+++ b/arithmetic/build.gradle
@@ -22,7 +22,7 @@ plugins {
 dependencies {
     implementation 'net.java.dev.jna:jna:5.12.1'
     testImplementation 'com.google.guava:guava:31.1-jre'
-    testImplementation 'org.apache.tuweni:tuweni-bytes:2.2.0'
+    testImplementation 'io.tmio:tuweni-bytes:2.4.2'
     testImplementation 'org.assertj:assertj-core:3.22.0'
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.8.2'
diff --git a/bls12-381/build.gradle b/bls12-381/build.gradle
index a72bb85a..2ac5a06b 100644
--- a/bls12-381/build.gradle
+++ b/bls12-381/build.gradle
@@ -1,5 +1,5 @@
 /*
- * Copyright ConsenSys AG.
+ * Copyright Hyperledger Besu contributors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
@@ -23,7 +23,7 @@ dependencies {
   implementation 'net.java.dev.jna:jna:5.12.1'
   testImplementation 'com.google.guava:guava:31.1-jre'
   testImplementation 'junit:junit:4.13.2'
-  testImplementation 'org.apache.tuweni:tuweni-bytes:2.2.0'
+  testImplementation 'io.tmio:tuweni-bytes:2.4.2'
   testImplementation 'org.assertj:assertj-core:3.22.0'
 }
 
diff --git a/gnark/build.gradle b/gnark/build.gradle
index 3142d34a..6bff6c8a 100644
--- a/gnark/build.gradle
+++ b/gnark/build.gradle
@@ -21,8 +21,9 @@ plugins {
 
 dependencies {
     implementation 'net.java.dev.jna:jna:5.12.1'
+    testImplementation 'com.google.guava:guava:31.1-jre'
     testImplementation 'net.java.dev.jna:jna:5.12.1'
-    implementation 'org.apache.tuweni:tuweni-bytes:2.2.0'
+    testImplementation 'io.tmio:tuweni-bytes:2.4.2'
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.assertj:assertj-core:3.22.0'
     testImplementation 'org.mockito:mockito-core:4.4.0'
diff --git a/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP196.java b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP196.java
index 06ffaac1..17b1c7af 100644
--- a/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP196.java
+++ b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP196.java
@@ -2,7 +2,6 @@
 
 import com.sun.jna.Native;
 import com.sun.jna.ptr.IntByReference;
-import org.apache.tuweni.bytes.Bytes;
 
 public class LibGnarkEIP196 {
 
@@ -61,8 +60,7 @@ public static int eip196_perform_operation(
     }
 
     if (ret != 0) {
-      var errBytes = Bytes.wrap(err);
-      err_len.setValue(errBytes.size() - errBytes.numberOfTrailingZeroBytes());
+      err_len.setValue(LibGnarkUtils.findFirstTrailingZeroIndex(err));
       o_len.setValue(0);
     } else {
       err_len.setValue(0);
@@ -70,7 +68,6 @@ public static int eip196_perform_operation(
     return ret;
   }
 
-
   public static native int eip196altbn128G1Add(
       byte[] input,
       byte[] output,
diff --git a/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP2537.java b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP2537.java
index 1c56c5b6..7cf245d8 100644
--- a/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP2537.java
+++ b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkEIP2537.java
@@ -3,9 +3,6 @@
 import com.sun.jna.Library;
 import com.sun.jna.Native;
 import com.sun.jna.ptr.IntByReference;
-import org.apache.tuweni.bytes.Bytes;
-
-import java.nio.charset.StandardCharsets;
 
 public class LibGnarkEIP2537 implements Library {
 
@@ -110,8 +107,7 @@ public static int eip2537_perform_operation(
     }
 
     if (ret != 0) {
-      var errBytes = Bytes.wrap(err);
-      err_len.setValue(errBytes.size() - errBytes.numberOfTrailingZeroBytes());
+      err_len.setValue(LibGnarkUtils.findFirstTrailingZeroIndex(err));
       o_len.setValue(0);
     } else {
       err_len.setValue(0);
diff --git a/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkUtils.java b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkUtils.java
new file mode 100644
index 00000000..e8fc70d1
--- /dev/null
+++ b/gnark/src/main/java/org/hyperledger/besu/nativelib/gnark/LibGnarkUtils.java
@@ -0,0 +1,14 @@
+package org.hyperledger.besu.nativelib.gnark;
+
+public class LibGnarkUtils {
+
+  public static int findFirstTrailingZeroIndex(byte[] array) {
+    for (int i = array.length - 1; i >= 0; i--) {
+      if (array[i] != 0) {
+        return i + 1; // The first trailing zero is after this non-zero byte
+      }
+    }
+    // If all bytes are zero, return 0
+    return 0;
+  }
+}
diff --git a/ipa-multipoint/build.gradle b/ipa-multipoint/build.gradle
index c86ca91b..103a7bb7 100644
--- a/ipa-multipoint/build.gradle
+++ b/ipa-multipoint/build.gradle
@@ -21,7 +21,7 @@ plugins {
 
 dependencies {
     implementation 'net.java.dev.jna:jna:5.12.1'
-    testImplementation 'org.apache.tuweni:tuweni-bytes:2.3.1'
+  testImplementation 'io.tmio:tuweni-bytes:2.4.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.7.2'
     testImplementation 'com.fasterxml.jackson.core:jackson-databind:2.12.5'
diff --git a/secp256r1/build.gradle b/secp256r1/build.gradle
index d948cab4..2111de60 100644
--- a/secp256r1/build.gradle
+++ b/secp256r1/build.gradle
@@ -1,5 +1,5 @@
 /*
- * Copyright ConsenSys AG.
+ * Copyright Hyperledger Besu contributors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
@@ -24,7 +24,7 @@ dependencies {
 
     testImplementation 'com.google.guava:guava:31.1-jre'
     testImplementation 'junit:junit:4.13.2'
-    testImplementation 'org.apache.tuweni:tuweni-bytes:2.2.0'
+    testImplementation 'io.tmio:tuweni-bytes:2.4.2'
     testImplementation 'org.assertj:assertj-core:3.22.0'
 }