diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 000000000..f5c287c54
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,29 @@
+## How to contribute to web3j
+
+Thank you for reading this! If you'd like to report a bug or join in the buidl-ing of web3j, then here are some notes on how to do that.
+
+#### **Did you find a bug?**
+
+* **Ensure the bug was not already reported** by searching on GitHub under [Issues](https://github.com/web3j/web3j/issues). If there is then please add any more information that you have, or give it a :+1:. This will help us prioritize work.
+
+* If you're unable to find an open issue addressing the problem, [open a new one](https://github.com/web3j/web3j/issues/new). Be sure to include a **title and clear description**, as much relevant information as possible, and a **code sample** or event better an **executable test case** demonstrating the expected behavior that is not occurring. 
+
+#### **Did you write a patch that fixes a bug?**
+
+* Open a new pull request with the patch.
+
+* Ensure the PR description clearly describes the problem and solution. Include the relevant issue number if applicable.
+
+#### **Do you intend to add a new feature or change an existing one?**
+
+* Suggest your change in the [gitter channel](https://gitter.im/web3j/web3j) then start writing code.
+
+* Do not open an issue on GitHub until you have collected positive feedback about the change. GitHub issues are primarily intended for bug reports and fixes.
+
+#### **Do you have questions about the source code?**
+
+* Ask any question about how to use web3j should be directed to the [gitter channel](https://gitter.im/web3j/web3j)
+
+## :heart: BUIDL :heart:
+
+team web3j 
diff --git a/core/src/main/java/org/web3j/crypto/WalletUtils.java b/core/src/main/java/org/web3j/crypto/WalletUtils.java
index ad5cd64f3..35c27707c 100644
--- a/core/src/main/java/org/web3j/crypto/WalletUtils.java
+++ b/core/src/main/java/org/web3j/crypto/WalletUtils.java
@@ -108,6 +108,27 @@ public static Bip39Wallet generateBip39Wallet(String password, File destinationD
         return new Bip39Wallet(walletFile, mnemonic);
     }
 
+    /**
+     * Generates a BIP-39 compatible Ethereum wallet using a mnemonic passed as argument.
+     *
+     * @param password Will be used for both wallet encryption and passphrase for BIP-39 seed
+     * @param mnemonic The mnemonic that will be used to generate the seed
+     * @param destinationDirectory The directory containing the wallet
+     * @return A BIP-39 compatible Ethereum wallet
+     * @throws CipherException if the underlying cipher is not available
+     * @throws IOException if the destination cannot be written to
+     */
+    public static Bip39Wallet generateBip39WalletFromMnemonic(
+            String password, String mnemonic, File destinationDirectory)
+            throws CipherException, IOException {
+        byte[] seed = MnemonicUtils.generateSeed(mnemonic, password);
+        ECKeyPair privateKey = ECKeyPair.create(sha256(seed));
+
+        String walletFile = generateWalletFile(password, privateKey, destinationDirectory, false);
+
+        return new Bip39Wallet(walletFile, mnemonic);
+    }
+
     public static Credentials loadCredentials(String password, String source)
             throws IOException, CipherException {
         return loadCredentials(password, new File(source));
diff --git a/core/src/main/java/org/web3j/ens/Contracts.java b/core/src/main/java/org/web3j/ens/Contracts.java
index 22eeb3f92..26bb9fd55 100644
--- a/core/src/main/java/org/web3j/ens/Contracts.java
+++ b/core/src/main/java/org/web3j/ens/Contracts.java
@@ -1,6 +1,6 @@
 package org.web3j.ens;
 
-import org.web3j.tx.ChainId;
+import org.web3j.tx.ChainIdLong;
 
 /**
  * ENS registry contract addresses.
@@ -12,16 +12,16 @@ public class Contracts {
     public static final String RINKEBY = "0xe7410170f87102df0055eb195163a03b7f2bff4a";
 
     public static String resolveRegistryContract(String chainId) {
-        switch (Byte.valueOf(chainId)) {
-            case ChainId.MAINNET:
-                return MAINNET;
-            case ChainId.ROPSTEN:
-                return ROPSTEN;
-            case ChainId.RINKEBY:
-                return RINKEBY;
-            default:
-                throw new EnsResolutionException(
-                        "Unable to resolve ENS registry contract for network id: " + chainId);
+        final Long chainIdLong = Long.parseLong(chainId);
+        if (chainIdLong.equals(ChainIdLong.MAINNET)) {
+            return MAINNET;
+        } else if (chainIdLong.equals(ChainIdLong.ROPSTEN)) {
+            return ROPSTEN;
+        } else if (chainIdLong.equals(ChainIdLong.RINKEBY)) {
+            return RINKEBY;
+        } else {
+            throw new EnsResolutionException(
+                "Unable to resolve ENS registry contract for network id: " + chainId);
         }
     }
 }
diff --git a/core/src/main/java/org/web3j/ens/EnsResolver.java b/core/src/main/java/org/web3j/ens/EnsResolver.java
index 0defe36cc..26affc37f 100644
--- a/core/src/main/java/org/web3j/ens/EnsResolver.java
+++ b/core/src/main/java/org/web3j/ens/EnsResolver.java
@@ -9,7 +9,6 @@
 import org.web3j.protocol.core.methods.response.EthSyncing;
 import org.web3j.protocol.core.methods.response.NetVersion;
 import org.web3j.tx.ClientTransactionManager;
-import org.web3j.tx.ManagedTransaction;
 import org.web3j.tx.TransactionManager;
 import org.web3j.tx.gas.DefaultGasProvider;
 import org.web3j.utils.Numeric;
diff --git a/core/src/main/java/org/web3j/tx/ChainId.java b/core/src/main/java/org/web3j/tx/ChainId.java
index cd2153adf..7df1f5229 100644
--- a/core/src/main/java/org/web3j/tx/ChainId.java
+++ b/core/src/main/java/org/web3j/tx/ChainId.java
@@ -4,6 +4,7 @@
  * Ethereum chain ids as per
  * <a href="https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md">EIP-155</a>.
  */
+@Deprecated
 public class ChainId {
     public static final byte NONE = -1;
     public static final byte MAINNET = 1;
@@ -16,3 +17,4 @@ public class ChainId {
     public static final byte ETHEREUM_CLASSIC_MAINNET = 61;
     public static final byte ETHEREUM_CLASSIC_TESTNET = 62;
 }
+
diff --git a/core/src/main/java/org/web3j/tx/ChainIdLong.java b/core/src/main/java/org/web3j/tx/ChainIdLong.java
new file mode 100644
index 000000000..8df588241
--- /dev/null
+++ b/core/src/main/java/org/web3j/tx/ChainIdLong.java
@@ -0,0 +1,14 @@
+package org.web3j.tx;
+
+public class ChainIdLong {
+    public static final long NONE = -1;
+    public static final long MAINNET = 1;
+    public static final long EXPANSE_MAINNET = 2;
+    public static final long ROPSTEN = 3;
+    public static final long RINKEBY = 4;
+    public static final long ROOTSTOCK_MAINNET = 30;
+    public static final long ROOTSTOCK_TESTNET = 31;
+    public static final long KOVAN = 42;
+    public static final long ETHEREUM_CLASSIC_MAINNET = 61;
+    public static final long ETHEREUM_CLASSIC_TESTNET = 62;
+}
diff --git a/core/src/main/java/org/web3j/tx/RawTransactionManager.java b/core/src/main/java/org/web3j/tx/RawTransactionManager.java
index 7b2c190f6..126e47da9 100644
--- a/core/src/main/java/org/web3j/tx/RawTransactionManager.java
+++ b/core/src/main/java/org/web3j/tx/RawTransactionManager.java
@@ -29,11 +29,11 @@ public class RawTransactionManager extends TransactionManager {
     private final Web3j web3j;
     final Credentials credentials;
 
-    private final byte chainId;
+    private final long chainId;
 
     protected TxHashVerifier txHashVerifier = new TxHashVerifier();
 
-    public RawTransactionManager(Web3j web3j, Credentials credentials, byte chainId) {
+    public RawTransactionManager(Web3j web3j, Credentials credentials, long chainId) {
         super(web3j, credentials.getAddress());
 
         this.web3j = web3j;
@@ -43,7 +43,7 @@ public RawTransactionManager(Web3j web3j, Credentials credentials, byte chainId)
     }
 
     public RawTransactionManager(
-            Web3j web3j, Credentials credentials, byte chainId,
+            Web3j web3j, Credentials credentials, long chainId,
             TransactionReceiptProcessor transactionReceiptProcessor) {
         super(transactionReceiptProcessor, credentials.getAddress());
 
@@ -54,7 +54,7 @@ public RawTransactionManager(
     }
 
     public RawTransactionManager(
-            Web3j web3j, Credentials credentials, byte chainId, int attempts, long sleepDuration) {
+            Web3j web3j, Credentials credentials, long chainId, int attempts, long sleepDuration) {
         super(web3j, attempts, sleepDuration, credentials.getAddress());
 
         this.web3j = web3j;
diff --git a/core/src/test/java/org/web3j/crypto/WalletUtilsTest.java b/core/src/test/java/org/web3j/crypto/WalletUtilsTest.java
index c57725561..5cfad5699 100644
--- a/core/src/test/java/org/web3j/crypto/WalletUtilsTest.java
+++ b/core/src/test/java/org/web3j/crypto/WalletUtilsTest.java
@@ -18,6 +18,7 @@
 import static org.web3j.crypto.Hash.sha256;
 import static org.web3j.crypto.SampleKeys.CREDENTIALS;
 import static org.web3j.crypto.SampleKeys.KEY_PAIR;
+import static org.web3j.crypto.SampleKeys.MNEMONIC;
 import static org.web3j.crypto.SampleKeys.PASSWORD;
 import static org.web3j.crypto.WalletUtils.isValidAddress;
 import static org.web3j.crypto.WalletUtils.isValidPrivateKey;
@@ -48,6 +49,16 @@ public void testGenerateBip39Wallets() throws Exception {
         assertEquals(credentials, WalletUtils.loadBip39Credentials(PASSWORD, wallet.getMnemonic()));
     }
 
+    @Test
+    public void testGenerateBip39WalletFromMnemonic() throws Exception {
+        Bip39Wallet wallet = WalletUtils.generateBip39WalletFromMnemonic(
+                PASSWORD, MNEMONIC, tempDir);
+        byte[] seed = MnemonicUtils.generateSeed(wallet.getMnemonic(), PASSWORD);
+        Credentials credentials = Credentials.create(ECKeyPair.create(sha256(seed)));
+
+        assertEquals(credentials, WalletUtils.loadBip39Credentials(PASSWORD, wallet.getMnemonic()));
+    }
+
     @Test
     public void testGenerateFullNewWalletFile() throws Exception {
         String fileName = WalletUtils.generateFullNewWalletFile(PASSWORD, tempDir);
diff --git a/core/src/test/java/org/web3j/ens/EnsResolverTest.java b/core/src/test/java/org/web3j/ens/EnsResolverTest.java
index ed1894d29..571cb276a 100644
--- a/core/src/test/java/org/web3j/ens/EnsResolverTest.java
+++ b/core/src/test/java/org/web3j/ens/EnsResolverTest.java
@@ -6,19 +6,16 @@
 import org.junit.Before;
 import org.junit.Test;
 
-import org.web3j.abi.TypeDecoder;
 import org.web3j.abi.TypeEncoder;
 import org.web3j.abi.datatypes.Utf8String;
 import org.web3j.protocol.Web3j;
 import org.web3j.protocol.Web3jService;
-import org.web3j.protocol.core.JsonRpc2_0Web3j;
 import org.web3j.protocol.core.Request;
 import org.web3j.protocol.core.methods.response.EthBlock;
 import org.web3j.protocol.core.methods.response.EthCall;
 import org.web3j.protocol.core.methods.response.EthSyncing;
 import org.web3j.protocol.core.methods.response.NetVersion;
-import org.web3j.protocol.http.HttpService;
-import org.web3j.tx.ChainId;
+import org.web3j.tx.ChainIdLong;
 import org.web3j.utils.Numeric;
 
 import static org.hamcrest.CoreMatchers.is;
@@ -51,7 +48,7 @@ public void testResolve() throws Exception {
         configureLatestBlock(System.currentTimeMillis() / 1000);  // block timestamp is in seconds
 
         NetVersion netVersion = new NetVersion();
-        netVersion.setResult(Byte.toString(ChainId.MAINNET));
+        netVersion.setResult(Long.toString(ChainIdLong.MAINNET));
 
         String resolverAddress =
                 "0x0000000000000000000000004c641fb9bad9b60ef180c31f56051ce826d21a9a";
@@ -81,7 +78,7 @@ public void testReverseResolve() throws Exception {
         configureLatestBlock(System.currentTimeMillis() / 1000);  // block timestamp is in seconds
 
         NetVersion netVersion = new NetVersion();
-        netVersion.setResult(Byte.toString(ChainId.MAINNET));
+        netVersion.setResult(Long.toString(ChainIdLong.MAINNET));
 
         String resolverAddress =
                 "0x0000000000000000000000004c641fb9bad9b60ef180c31f56051ce826d21a9a";
diff --git a/crypto/src/main/java/org/web3j/crypto/Sign.java b/crypto/src/main/java/org/web3j/crypto/Sign.java
index 4df6ab85b..1c5582097 100644
--- a/crypto/src/main/java/org/web3j/crypto/Sign.java
+++ b/crypto/src/main/java/org/web3j/crypto/Sign.java
@@ -82,7 +82,7 @@ public static SignatureData signMessage(byte[] message, ECKeyPair keyPair, boole
         int headerByte = recId + 27;
 
         // 1 header + 32 bytes for R + 32 bytes for S
-        byte v = (byte) headerByte;
+        byte[] v = new byte[]{(byte) headerByte};
         byte[] r = Numeric.toBytesPadded(sig.r, 32);
         byte[] s = Numeric.toBytesPadded(sig.s, 32);
 
@@ -217,7 +217,7 @@ static BigInteger signedMessageHashToKey(
         verifyPrecondition(r != null && r.length == 32, "r must be 32 bytes");
         verifyPrecondition(s != null && s.length == 32, "s must be 32 bytes");
 
-        int header = signatureData.getV() & 0xFF;
+        int header = signatureData.getV()[0] & 0xFF;
         // The header byte: 0x1B = first key with even y, 0x1C = first key with odd y,
         //                  0x1D = second key with even y, 0x1E = second key with odd y
         if (header < 27 || header > 34) {
@@ -277,17 +277,21 @@ public static BigInteger publicFromPoint(byte[] bits) {
     }
 
     public static class SignatureData {
-        private final byte v;
+        private final byte[] v;
         private final byte[] r;
         private final byte[] s;
 
         public SignatureData(byte v, byte[] r, byte[] s) {
+            this(new byte[]{v}, r, s);
+        }
+
+        public SignatureData(byte[] v, byte[] r, byte[] s) {
             this.v = v;
             this.r = r;
             this.s = s;
         }
 
-        public byte getV() {
+        public byte[] getV() {
             return v;
         }
 
@@ -310,7 +314,7 @@ public boolean equals(Object o) {
 
             SignatureData that = (SignatureData) o;
 
-            if (v != that.v) {
+            if (!Arrays.equals(v, that.v)) {
                 return false;
             }
             if (!Arrays.equals(r, that.r)) {
@@ -321,7 +325,7 @@ public boolean equals(Object o) {
 
         @Override
         public int hashCode() {
-            int result = (int) v;
+            int result = Arrays.hashCode(v);
             result = 31 * result + Arrays.hashCode(r);
             result = 31 * result + Arrays.hashCode(s);
             return result;
diff --git a/crypto/src/main/java/org/web3j/crypto/SignedRawTransaction.java b/crypto/src/main/java/org/web3j/crypto/SignedRawTransaction.java
index 472b71fd9..8ae198ee1 100644
--- a/crypto/src/main/java/org/web3j/crypto/SignedRawTransaction.java
+++ b/crypto/src/main/java/org/web3j/crypto/SignedRawTransaction.java
@@ -3,12 +3,14 @@
 import java.math.BigInteger;
 import java.security.SignatureException;
 
+import org.web3j.utils.Numeric;
+
 public class SignedRawTransaction extends RawTransaction {
 
     private static final int CHAIN_ID_INC = 35;
     private static final int LOWER_REAL_V = 27;
 
-    private Sign.SignatureData signatureData;
+    private final Sign.SignatureData signatureData;
 
     public SignedRawTransaction(BigInteger nonce, BigInteger gasPrice,
             BigInteger gasLimit, String to, BigInteger value, String data,
@@ -29,7 +31,7 @@ public String getFrom() throws SignatureException {
         } else {
             encodedTransaction = TransactionEncoder.encode(this, chainId.byteValue());
         }
-        byte v = signatureData.getV();
+        BigInteger v = Numeric.toBigInt(signatureData.getV());
         byte[] r = signatureData.getR();
         byte[] s = signatureData.getS();
         Sign.SignatureData signatureDataV = new Sign.SignatureData(getRealV(v), r, s);
@@ -44,9 +46,10 @@ public void verify(String from) throws SignatureException {
         }
     }
 
-    private byte getRealV(byte v) {
+    private byte getRealV(BigInteger bv) {
+        long v = bv.longValue();
         if (v == LOWER_REAL_V || v == (LOWER_REAL_V + 1)) {
-            return v;
+            return (byte) v;
         }
         byte realV = LOWER_REAL_V;
         int inc = 0;
@@ -57,11 +60,12 @@ private byte getRealV(byte v) {
     }
 
     public Integer getChainId() {
-        byte v = signatureData.getV();
+        BigInteger bv = Numeric.toBigInt(signatureData.getV());
+        long v = bv.longValue();
         if (v == LOWER_REAL_V || v == (LOWER_REAL_V + 1)) {
             return null;
         }
-        Integer chainId = (v - CHAIN_ID_INC) / 2;
+        Integer chainId = (int)((v - CHAIN_ID_INC) / 2);
         return chainId;
     }
 }
diff --git a/crypto/src/main/java/org/web3j/crypto/TransactionDecoder.java b/crypto/src/main/java/org/web3j/crypto/TransactionDecoder.java
index 75ccdc4ea..4716d0802 100644
--- a/crypto/src/main/java/org/web3j/crypto/TransactionDecoder.java
+++ b/crypto/src/main/java/org/web3j/crypto/TransactionDecoder.java
@@ -20,7 +20,7 @@ public static RawTransaction decode(String hexTransaction) {
         BigInteger value = ((RlpString) values.getValues().get(4)).asPositiveBigInteger();
         String data = ((RlpString) values.getValues().get(5)).asString();
         if (values.getValues().size() > 6) {
-            byte v = ((RlpString) values.getValues().get(6)).getBytes()[0];
+            byte[] v = ((RlpString) values.getValues().get(6)).getBytes();
             byte[] r = Numeric.toBytesPadded(
                 Numeric.toBigInt(((RlpString) values.getValues().get(7)).getBytes()), 32);
             byte[] s = Numeric.toBytesPadded(
@@ -33,5 +33,4 @@ public static RawTransaction decode(String hexTransaction) {
                 gasPrice, gasLimit, to, value, data);
         }
     }
-    
 }
diff --git a/crypto/src/main/java/org/web3j/crypto/TransactionEncoder.java b/crypto/src/main/java/org/web3j/crypto/TransactionEncoder.java
index 6a5a1eedf..454e9bb8b 100644
--- a/crypto/src/main/java/org/web3j/crypto/TransactionEncoder.java
+++ b/crypto/src/main/java/org/web3j/crypto/TransactionEncoder.java
@@ -1,5 +1,7 @@
 package org.web3j.crypto;
 
+import java.math.BigInteger;
+import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -16,6 +18,9 @@
  */
 public class TransactionEncoder {
 
+    private static final int CHAIN_ID_INC = 35;
+    private static final int LOWER_REAL_V = 27;
+
     public static byte[] signMessage(RawTransaction rawTransaction, Credentials credentials) {
         byte[] encodedTransaction = encode(rawTransaction);
         Sign.SignatureData signatureData = Sign.signMessage(
@@ -25,7 +30,7 @@ public static byte[] signMessage(RawTransaction rawTransaction, Credentials cred
     }
 
     public static byte[] signMessage(
-            RawTransaction rawTransaction, byte chainId, Credentials credentials) {
+            RawTransaction rawTransaction, long chainId, Credentials credentials) {
         byte[] encodedTransaction = encode(rawTransaction, chainId);
         Sign.SignatureData signatureData = Sign.signMessage(
                 encodedTransaction, credentials.getEcKeyPair());
@@ -34,30 +39,56 @@ public static byte[] signMessage(
         return encode(rawTransaction, eip155SignatureData);
     }
 
+    @Deprecated
+    public static byte[] signMessage(
+            RawTransaction rawTransaction, byte chainId, Credentials credentials) {
+        return signMessage(rawTransaction, (long) chainId, credentials);
+    }
+
     public static Sign.SignatureData createEip155SignatureData(
-            Sign.SignatureData signatureData, byte chainId) {
-        byte v = (byte) (signatureData.getV() + (chainId << 1) + 8);
+            Sign.SignatureData signatureData, long chainId) {
+        BigInteger v = Numeric.toBigInt(signatureData.getV());
+        v = v.subtract(BigInteger.valueOf(LOWER_REAL_V));
+        v = v.add(BigInteger.valueOf(chainId * 2));
+        v = v.add(BigInteger.valueOf(CHAIN_ID_INC));
 
         return new Sign.SignatureData(
-                v, signatureData.getR(), signatureData.getS());
+                v.toByteArray(), signatureData.getR(), signatureData.getS());
+    }
+
+    @Deprecated
+    public static Sign.SignatureData createEip155SignatureData(
+            Sign.SignatureData signatureData, byte chainId) {
+        return createEip155SignatureData(signatureData, (long) chainId);
     }
 
     public static byte[] encode(RawTransaction rawTransaction) {
         return encode(rawTransaction, null);
     }
 
-    public static byte[] encode(RawTransaction rawTransaction, byte chainId) {
+    public static byte[] encode(RawTransaction rawTransaction, long chainId) {
         Sign.SignatureData signatureData = new Sign.SignatureData(
-                chainId, new byte[] {}, new byte[] {});
+                longToBytes(chainId), new byte[] {}, new byte[] {});
         return encode(rawTransaction, signatureData);
     }
 
+    @Deprecated
+    public static byte[] encode(RawTransaction rawTransaction, byte chainId) {
+        return encode(rawTransaction, (long) chainId);
+    }
+
     private static byte[] encode(RawTransaction rawTransaction, Sign.SignatureData signatureData) {
         List<RlpType> values = asRlpValues(rawTransaction, signatureData);
         RlpList rlpList = new RlpList(values);
         return RlpEncoder.encode(rlpList);
     }
 
+    private static byte[] longToBytes(long x) {
+        ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
+        buffer.putLong(x);
+        return buffer.array();
+    }
+
     static List<RlpType> asRlpValues(
             RawTransaction rawTransaction, Sign.SignatureData signatureData) {
         List<RlpType> result = new ArrayList<>();
@@ -83,7 +114,7 @@ static List<RlpType> asRlpValues(
         result.add(RlpString.create(data));
 
         if (signatureData != null) {
-            result.add(RlpString.create(signatureData.getV()));
+            result.add(RlpString.create(Bytes.trimLeadingZeroes(signatureData.getV())));
             result.add(RlpString.create(Bytes.trimLeadingZeroes(signatureData.getR())));
             result.add(RlpString.create(Bytes.trimLeadingZeroes(signatureData.getS())));
         }
diff --git a/crypto/src/test/java/org/web3j/crypto/SampleKeys.java b/crypto/src/test/java/org/web3j/crypto/SampleKeys.java
index 4a8ca29f1..d13d359cb 100644
--- a/crypto/src/test/java/org/web3j/crypto/SampleKeys.java
+++ b/crypto/src/test/java/org/web3j/crypto/SampleKeys.java
@@ -18,6 +18,8 @@ public class SampleKeys {
     public static final String ADDRESS_NO_PREFIX = Numeric.cleanHexPrefix(ADDRESS);
 
     public static final String PASSWORD = "Insecure Pa55w0rd";
+    public static final String MNEMONIC = "scatter major grant return flee easy female jungle"
+            + " vivid movie bicycle absent weather inspire carry";
 
     static final BigInteger PRIVATE_KEY = Numeric.toBigInt(PRIVATE_KEY_STRING);
     static final BigInteger PUBLIC_KEY = Numeric.toBigInt(PUBLIC_KEY_STRING);
diff --git a/crypto/src/test/java/org/web3j/crypto/TransactionDecoderTest.java b/crypto/src/test/java/org/web3j/crypto/TransactionDecoderTest.java
index 7e0414cc4..fd6c35e20 100644
--- a/crypto/src/test/java/org/web3j/crypto/TransactionDecoderTest.java
+++ b/crypto/src/test/java/org/web3j/crypto/TransactionDecoderTest.java
@@ -75,7 +75,7 @@ public void testDecodingSignedChainId() throws Exception {
         BigInteger gasLimit = BigInteger.TEN;
         String to = "0x0add5355";
         BigInteger value = BigInteger.valueOf(Long.MAX_VALUE);
-        Integer chainId = 1;
+        Integer chainId = 46;
         RawTransaction rawTransaction = RawTransaction.createEtherTransaction(
                 nonce, gasPrice, gasLimit, to, value);
         byte[] signedMessage = TransactionEncoder.signMessage(
diff --git a/gradle.properties b/gradle.properties
index f7aeea0c0..c62d94add 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
 group=org.web3j
-version=4.2.0
+version=4.3.0-SNAPSHOT