diff --git a/backend-modules/koios/src/it/java/com/bloxbean/cardano/client/backend/koios/it/KoiosEpochServiceIT.java b/backend-modules/koios/src/it/java/com/bloxbean/cardano/client/backend/koios/it/KoiosEpochServiceIT.java
index 722199f1..923aaa5f 100644
--- a/backend-modules/koios/src/it/java/com/bloxbean/cardano/client/backend/koios/it/KoiosEpochServiceIT.java
+++ b/backend-modules/koios/src/it/java/com/bloxbean/cardano/client/backend/koios/it/KoiosEpochServiceIT.java
@@ -108,6 +108,6 @@ void testGetLatestProtocolParameters() throws ApiException {
 
         assertThat(protocolParams.getCostModels().get("PlutusV1").size(), is(166));
         assertThat(protocolParams.getCostModels().get("PlutusV2").size(), is(175));
-        assertThat(protocolParams.getCostModels().get("PlutusV3").size(), is(251));
+        assertThat(protocolParams.getCostModels().get("PlutusV3").size(), greaterThan(251));
     }
 }
diff --git a/gradle.properties b/gradle.properties
index 0fe9c2cf..f52d67cf 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
 group = com.bloxbean.cardano
 artifactId = cardano-client-lib
-version = 0.6.4-SNAPSHOT
+version = 0.7.0-beta1
diff --git a/integration-test/src/it/java/com/bloxbean/cardano/client/function/ContractTxBuilderContextITTest.java b/integration-test/src/it/java/com/bloxbean/cardano/client/function/ContractTxBuilderContextITTest.java
index b9d6dacc..b566ecc5 100644
--- a/integration-test/src/it/java/com/bloxbean/cardano/client/function/ContractTxBuilderContextITTest.java
+++ b/integration-test/src/it/java/com/bloxbean/cardano/client/function/ContractTxBuilderContextITTest.java
@@ -318,10 +318,11 @@ void customDatumCustomRedeemerGuessContractAndSumContract() throws CborSerializa
 
         TxSigner signer = SignerProviders.signerFrom(sender);
 
+        var txContext = TxBuilderContext.init(utxoSupplier, protocolParams);
         Transaction transaction = TxBuilderContext.init(utxoSupplier, protocolParams)
                 .withSerializationEra(Era.Babbage)
                 .build(builder);
-        Transaction signedTxn = signer.sign(transaction);
+        Transaction signedTxn = signer.sign(txContext, transaction);
 
         //Or build and sign in one call
         //  Transaction signedTxn = TxBuilderContext.init(backendService)
diff --git a/integration-test/src/it/java/com/bloxbean/cardano/client/function/StakeTransactionIT.java b/integration-test/src/it/java/com/bloxbean/cardano/client/function/StakeTransactionIT.java
index f08701b2..d0ccacfd 100644
--- a/integration-test/src/it/java/com/bloxbean/cardano/client/function/StakeTransactionIT.java
+++ b/integration-test/src/it/java/com/bloxbean/cardano/client/function/StakeTransactionIT.java
@@ -219,7 +219,7 @@ void testStakeDelegation_addressKeyAsStakeKey() throws ApiException, CborSeriali
                 .andThen(adjustChangeOutput(senderAddr1, 2));
 
         TxSigner signer = SignerProviders.signerFrom(senderAccount1)
-                .andThen(transaction -> senderAccount1.signWithStakeKey(transaction));
+                .andThen((context, transaction) -> senderAccount1.signWithStakeKey(transaction));
 
         Transaction signedTransaction = TxBuilderContext.init(new DefaultUtxoSupplier(getBackendService().getUtxoService()), protocolParams)
                 .buildAndSign(builder, signer);
@@ -268,7 +268,7 @@ void testStakeDeRegistration_addressKeyAsStakeKey() throws ApiException, CborSer
                 .andThen(adjustChangeOutput(senderAddr3, 2));
 
         TxSigner signer = SignerProviders.signerFrom(senderAccount3)
-                .andThen(transaction -> TransactionSigner.INSTANCE.sign(transaction, stakeHdKeyPair));
+                .andThen((context,transaction) -> TransactionSigner.INSTANCE.sign(transaction, stakeHdKeyPair));
 
         Transaction signedTransaction = TxBuilderContext.init(new DefaultUtxoSupplier(getBackendService().getUtxoService()), protocolParams)
                 .buildAndSign(builder, signer);
@@ -319,7 +319,7 @@ void testStakeDelegationAnotherAccount() throws ApiException, CborSerializationE
                 .andThen(adjustChangeOutput(senderAddr4, 2));
 
         TxSigner signer = SignerProviders.signerFrom(senderAccount4)
-                .andThen(transaction -> senderAccount4.signWithStakeKey(transaction));
+                .andThen((context,transaction) -> senderAccount4.signWithStakeKey(transaction));
 
         Transaction signedTransaction = TxBuilderContext.init(new DefaultUtxoSupplier(getBackendService().getUtxoService()), protocolParams)
                 .buildAndSign(builder, signer);
@@ -365,8 +365,8 @@ void testWithdrawal() throws ApiException, CborSerializationException {
                 .andThen(adjustChangeOutput(senderAddr5, 3));
 
         TxSigner signer = SignerProviders.signerFrom(senderAccount5)
-                .andThen(transaction -> senderAccount5.signWithStakeKey(transaction))
-                .andThen(transaction -> senderAccount6.signWithStakeKey(transaction));
+                .andThen((context, transaction) -> senderAccount5.signWithStakeKey(transaction))
+                .andThen((context,transaction) -> senderAccount6.signWithStakeKey(transaction));
 
         Transaction signedTransaction = TxBuilderContext.init(new DefaultUtxoSupplier(getBackendService().getUtxoService()), protocolParams)
                 .buildAndSign(builder, signer);
@@ -471,8 +471,8 @@ void testStakeDelegation_scriptHashAsStakeKey() throws Exception {
                 .andThen(adjustChangeOutput(delegationFeePaymentAddress, 3));
 
         TxSigner signer = SignerProviders.signerFrom(delegationFeePaymentAccount)
-                .andThen(transaction -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(0)))
-                .andThen(transaction -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(1)));
+                .andThen((context, transaction) -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(0)))
+                .andThen((context,transaction) -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(1)));
 
         Transaction signedTransaction = TxBuilderContext.init(new DefaultUtxoSupplier(getBackendService().getUtxoService()), protocolParams)
                 .buildAndSign(builder, signer);
@@ -525,8 +525,8 @@ void testStakeDeRegistration_scriptHashAsStakeKey() throws ApiException, CborSer
                 .andThen(adjustChangeOutput(senderAddr9, 3));
 
         TxSigner signer = SignerProviders.signerFrom(senderAccount9)
-                .andThen(transaction -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(0)))
-                .andThen(transaction -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(1)));
+                .andThen((context, transaction) -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(0)))
+                .andThen((context,transaction) -> TransactionSigner.INSTANCE.sign(transaction, policy.getPolicyKeys().get(1)));
 
         Transaction signedTransaction = TxBuilderContext.init(new DefaultUtxoSupplier(getBackendService().getUtxoService()), protocolParams)
                 .buildAndSign(builder, signer);