diff --git a/address/address.go b/address/address.go
index df7bc5cb..1cc4865d 100644
--- a/address/address.go
+++ b/address/address.go
@@ -3,8 +3,8 @@ package address
 import (
 	"errors"
 	"fmt"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/bech32"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/bech32"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type Address struct {
@@ -226,4 +226,4 @@ func fromHrp(hrp string) (types.Network, error) {
 	default:
 		return 0, errors.New("unknown hrp")
 	}
-}
\ No newline at end of file
+}
diff --git a/address/address_test.go b/address/address_test.go
index 6d4bf55d..581c74be 100644
--- a/address/address_test.go
+++ b/address/address_test.go
@@ -2,7 +2,7 @@ package address
 
 import (
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
@@ -145,4 +145,4 @@ func TestInvalidDecode(t *testing.T) {
 	assert.NotNil(t, err)
 	_, err = Decode("ckb1qzda0cr08m85hc8jlnfp3zer7xulejywt49kt2rr0vthywaa50xwsqj0k2lzuhgvrgacvnhnzl8")
 	assert.NotNil(t, err)
-}
\ No newline at end of file
+}
diff --git a/address/address_tools.go b/address/address_tools.go
index 4c0b8f84..04845045 100644
--- a/address/address_tools.go
+++ b/address/address_tools.go
@@ -4,11 +4,11 @@ import (
 	"errors"
 	"fmt"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction/signer"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction/signer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 )
 
 func GenerateScriptSecp256K1Blake160SignhashAll(key *secp256k1.Secp256k1Key) *types.Script {
@@ -108,4 +108,4 @@ func GenerateSecp256k1Blake160MultisigScript(requireN, threshold int, publicKeys
 		HashType: types.HashTypeType,
 		Args:     args,
 	}, multisigScript.Encode(), nil
-}
\ No newline at end of file
+}
diff --git a/address/address_tools_test.go b/address/address_tools_test.go
index 81ba7678..a99c7e3a 100644
--- a/address/address_tools_test.go
+++ b/address/address_tools_test.go
@@ -3,9 +3,9 @@ package address
 import (
 	"encoding/hex"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
@@ -111,4 +111,4 @@ func TestGenerateSecp256k1MultisigScriptByHash(t *testing.T) {
 		t.Error(err)
 	}
 	assert.Equal(t, "ckt1qpw9q60tppt7l3j7r09qcp7lxnp3vcanvgha8pmvsa3jplykxn32sq0sfnkgf0ph76pkzwld9ujzex4pkeuwnlsdc5tqu", encoded)
-}
\ No newline at end of file
+}
diff --git a/api/api.go b/api/api.go
index 4e0165f1..7b76fd24 100644
--- a/api/api.go
+++ b/api/api.go
@@ -2,14 +2,14 @@ package api
 
 import (
 	"context"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
 
 	"github.com/ethereum/go-ethereum/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
-	"github.com/nervosnetwork/ckb-sdk-go/mercury"
-	"github.com/nervosnetwork/ckb-sdk-go/mercury/model"
-	C "github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/mercury"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/mercury/model"
+	C "github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type CkbApi interface {
diff --git a/collector/builder/builder.go b/collector/builder/builder.go
index fe83f90d..a835878d 100644
--- a/collector/builder/builder.go
+++ b/collector/builder/builder.go
@@ -2,11 +2,11 @@ package builder
 
 import (
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/collector/handler"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector/handler"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 	"strconv"
 )
diff --git a/collector/builder/builder_test.go b/collector/builder/builder_test.go
index d8fba130..92686dee 100644
--- a/collector/builder/builder_test.go
+++ b/collector/builder/builder_test.go
@@ -2,7 +2,7 @@ package builder
 
 import (
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/collector/builder/ckb.go b/collector/builder/ckb.go
index 24190369..1bff5387 100644
--- a/collector/builder/ckb.go
+++ b/collector/builder/ckb.go
@@ -2,11 +2,11 @@ package builder
 
 import (
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/collector/handler"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector/handler"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type CkbTransactionBuilder struct {
diff --git a/collector/builder/dao.go b/collector/builder/dao.go
index 8999a2d1..019a725f 100644
--- a/collector/builder/dao.go
+++ b/collector/builder/dao.go
@@ -5,11 +5,11 @@ import (
 	"context"
 	"encoding/binary"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/collector/handler"
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector/handler"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"math/big"
 )
 
diff --git a/collector/builder/sudt.go b/collector/builder/sudt.go
index 4310ae49..1fe2df8b 100644
--- a/collector/builder/sudt.go
+++ b/collector/builder/sudt.go
@@ -2,11 +2,11 @@ package builder
 
 import (
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 	"math/big"
 	"reflect"
 )
diff --git a/collector/builder/sudt_test.go b/collector/builder/sudt_test.go
index 4b8988b3..27636ea3 100644
--- a/collector/builder/sudt_test.go
+++ b/collector/builder/sudt_test.go
@@ -2,9 +2,9 @@ package builder
 
 import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 	"github.com/stretchr/testify/assert"
 	"math/big"
 	"testing"
@@ -73,8 +73,7 @@ func TestSudtTransactionBuilderBalance(t *testing.T) {
 		t.Error(err)
 	}
 
-	if _, err = b.AddSudtOutputByAddress("ckt1qzda0cr08m85hc8jlnfp3zer7xulejywt49kt2rr0vthywaa50xwsqdamwzrffgc54ef48493nfd2sd0h4cjnxg4850up", big.NewInt(1))
-		err != nil {
+	if _, err = b.AddSudtOutputByAddress("ckt1qzda0cr08m85hc8jlnfp3zer7xulejywt49kt2rr0vthywaa50xwsqdamwzrffgc54ef48493nfd2sd0h4cjnxg4850up", big.NewInt(1)); err != nil {
 		t.Error(err)
 	}
 	b.FeeRate = 1000
diff --git a/collector/example/example.go b/collector/example/example.go
index 6d1f5a63..25d962f6 100644
--- a/collector/example/example.go
+++ b/collector/example/example.go
@@ -4,15 +4,15 @@ import (
 	"context"
 	"fmt"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	builder2 "github.com/nervosnetwork/ckb-sdk-go/collector/builder"
-	"github.com/nervosnetwork/ckb-sdk-go/collector/handler"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction/signer"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	builder2 "github.com/nervosnetwork/ckb-sdk-go/v2/collector/builder"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector/handler"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction/signer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"math/big"
 )
 
diff --git a/collector/handler/ckb.go b/collector/handler/ckb.go
index cbc3ce74..3c2943d1 100644
--- a/collector/handler/ckb.go
+++ b/collector/handler/ckb.go
@@ -1,10 +1,10 @@
 package handler
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction/signer"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction/signer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 )
 
diff --git a/collector/handler/dao.go b/collector/handler/dao.go
index be069ba8..7db9af17 100644
--- a/collector/handler/dao.go
+++ b/collector/handler/dao.go
@@ -4,10 +4,10 @@ import (
 	"bytes"
 	"context"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 )
 
diff --git a/collector/handler/sudt.go b/collector/handler/sudt.go
index c33e195f..d9349964 100644
--- a/collector/handler/sudt.go
+++ b/collector/handler/sudt.go
@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/collector"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/collector"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 )
 
diff --git a/collector/interface.go b/collector/interface.go
index 9227a386..17972998 100644
--- a/collector/interface.go
+++ b/collector/interface.go
@@ -1,8 +1,8 @@
 package collector
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type TransactionBuilder interface {
diff --git a/collector/iterator.go b/collector/iterator.go
index d4e089f2..27d6eacc 100644
--- a/collector/iterator.go
+++ b/collector/iterator.go
@@ -2,9 +2,9 @@ package collector
 
 import (
 	"context"
-	"github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type CellIterator interface {
diff --git a/collector/iterator_test.go b/collector/iterator_test.go
index af26fca1..9960ab22 100644
--- a/collector/iterator_test.go
+++ b/collector/iterator_test.go
@@ -2,8 +2,8 @@ package collector
 
 import (
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/collector/live_cell_collector.go b/collector/live_cell_collector.go
index a905f57d..c4ef63bb 100644
--- a/collector/live_cell_collector.go
+++ b/collector/live_cell_collector.go
@@ -2,9 +2,9 @@ package collector
 
 import (
 	"context"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/pkg/errors"
 )
 
diff --git a/crypto/key.go b/crypto/key.go
index 7e12c88a..a75661d0 100644
--- a/crypto/key.go
+++ b/crypto/key.go
@@ -1,8 +1,8 @@
 package crypto
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 )
 
 // Key key pair
diff --git a/crypto/secp256k1/key.go b/crypto/secp256k1/key.go
index 44d83a8a..89200d1f 100644
--- a/crypto/secp256k1/key.go
+++ b/crypto/secp256k1/key.go
@@ -12,10 +12,10 @@ import (
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
 	"math/big"
 
-	"github.com/nervosnetwork/ckb-sdk-go/crypto"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 )
 
 var (
diff --git a/dao/deposit.go b/dao/deposit.go
index c98a7c1d..7252eafe 100644
--- a/dao/deposit.go
+++ b/dao/deposit.go
@@ -3,8 +3,8 @@ package dao
 import (
 	"errors"
 
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 )
 
 type Deposit struct {
diff --git a/dao/helper.go b/dao/helper.go
index 7f23e88a..8f4cb865 100644
--- a/dao/helper.go
+++ b/dao/helper.go
@@ -4,8 +4,8 @@ import (
 	"context"
 	"encoding/binary"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"math/big"
 )
 
diff --git a/dao/helper_test.go b/dao/helper_test.go
index f4f9887d..78122102 100644
--- a/dao/helper_test.go
+++ b/dao/helper_test.go
@@ -1,8 +1,8 @@
 package dao
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/dao/withdraw.go b/dao/withdraw.go
index 4551ac4c..573394a5 100644
--- a/dao/withdraw.go
+++ b/dao/withdraw.go
@@ -5,9 +5,9 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 )
 
 type WithdrawPhase1 struct {
diff --git a/go.mod b/go.mod
index 14a9fd2a..aca84f6f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module github.com/nervosnetwork/ckb-sdk-go
+module github.com/nervosnetwork/ckb-sdk-go/v2
 
 go 1.17
 
diff --git a/indexer/indexer_test.go b/indexer/indexer_test.go
index 20bf8f94..bca360bb 100644
--- a/indexer/indexer_test.go
+++ b/indexer/indexer_test.go
@@ -3,7 +3,7 @@ package indexer
 import (
 	"context"
 	ethcommon "github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"runtime/debug"
 	"testing"
@@ -55,7 +55,7 @@ func TestGetCells(t *testing.T) {
 			Args:     ethcommon.FromHex("0x06c1c47ac39653cc231e31f4316b5a4903056512"),
 		},
 		ScriptType: ScriptTypeLock,
-		WithData: true,
+		WithData:   true,
 	}
 	resp, err = c.GetCells(context.Background(), s, SearchOrderAsc, 10, "")
 	checkError(t, err)
@@ -82,4 +82,4 @@ func checkError(t *testing.T, err error) {
 	if err != nil {
 		t.Error(err, string(debug.Stack()))
 	}
-}
\ No newline at end of file
+}
diff --git a/indexer/json.go b/indexer/json.go
index 84b8d2a2..bfd6b4d2 100644
--- a/indexer/json.go
+++ b/indexer/json.go
@@ -3,7 +3,7 @@ package indexer
 import (
 	"encoding/json"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type jsonCellsFilter struct {
@@ -109,4 +109,4 @@ func (r *TipHeader) UnmarshalJSON(input []byte) error {
 		BlockNumber: uint64(jsonObj.BlockNumber),
 	}
 	return nil
-}
\ No newline at end of file
+}
diff --git a/indexer/json_test.go b/indexer/json_test.go
index ab2af7cf..3882daf3 100644
--- a/indexer/json_test.go
+++ b/indexer/json_test.go
@@ -3,7 +3,7 @@ package indexer
 import (
 	"encoding/json"
 	ethcommon "github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/indexer/types.go b/indexer/types.go
index 0fa52876..c59f1278 100644
--- a/indexer/types.go
+++ b/indexer/types.go
@@ -1,7 +1,7 @@
 package indexer
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type ScriptType string
@@ -69,4 +69,4 @@ type Capacity struct {
 	Capacity    uint64     `json:"capacity"`
 	BlockHash   types.Hash `json:"block_hash"`
 	BlockNumber uint64     `json:"block_number"`
-}
\ No newline at end of file
+}
diff --git a/mercury/client.go b/mercury/client.go
index 74738630..37d7ff0b 100644
--- a/mercury/client.go
+++ b/mercury/client.go
@@ -2,11 +2,11 @@ package mercury
 
 import (
 	"context"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 
 	"github.com/ethereum/go-ethereum/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/mercury/model"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/mercury/model"
 )
 
 type Client interface {
diff --git a/mercury/client_test.go b/mercury/client_test.go
index bbde00a0..bef444ad 100644
--- a/mercury/client_test.go
+++ b/mercury/client_test.go
@@ -1,8 +1,8 @@
 package mercury
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/mercury/model"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/mercury/model"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"math/big"
 	"runtime/debug"
diff --git a/mercury/model/asset.go b/mercury/model/asset.go
index cf83d935..3e00fffd 100644
--- a/mercury/model/asset.go
+++ b/mercury/model/asset.go
@@ -1,6 +1,6 @@
 package model
 
-import "github.com/nervosnetwork/ckb-sdk-go/types"
+import "github.com/nervosnetwork/ckb-sdk-go/v2/types"
 
 type AssetType string
 
diff --git a/mercury/model/item.go b/mercury/model/item.go
index db5e06a0..1b022be1 100644
--- a/mercury/model/item.go
+++ b/mercury/model/item.go
@@ -3,8 +3,8 @@ package model
 import (
 	"errors"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	address2 "github.com/nervosnetwork/ckb-sdk-go/address"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	address2 "github.com/nervosnetwork/ckb-sdk-go/v2/address"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 )
 
diff --git a/mercury/model/payload.go b/mercury/model/payload.go
index b9e22b54..29d291ad 100644
--- a/mercury/model/payload.go
+++ b/mercury/model/payload.go
@@ -1,7 +1,7 @@
 package model
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"math/big"
 )
 
diff --git a/mercury/model/payload_json.go b/mercury/model/payload_json.go
index 6646f47b..7485a4ec 100644
--- a/mercury/model/payload_json.go
+++ b/mercury/model/payload_json.go
@@ -3,7 +3,7 @@ package model
 import (
 	"encoding/json"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 )
 
diff --git a/mercury/model/resp.go b/mercury/model/resp.go
index 801267d1..15aeafd0 100644
--- a/mercury/model/resp.go
+++ b/mercury/model/resp.go
@@ -1,7 +1,7 @@
 package model
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"math/big"
 )
 
diff --git a/mercury/model/resp_json.go b/mercury/model/resp_json.go
index e65b5f4e..06030d42 100644
--- a/mercury/model/resp_json.go
+++ b/mercury/model/resp_json.go
@@ -3,7 +3,7 @@ package model
 import (
 	"encoding/json"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/pkg/errors"
 	"math/big"
 	"reflect"
@@ -240,3 +240,18 @@ func (e *DaoState) UnmarshalJSON(input []byte) error {
 	}
 	return nil
 }
+
+func (r *DaoInfo) UnmarshalJSON(input []byte) error {
+	var jsonObj struct {
+		State  DaoState
+		Reward hexutil.Uint64
+	}
+	if err := json.Unmarshal(input, &jsonObj); err != nil {
+		return err
+	}
+	*r = DaoInfo{
+		State:  jsonObj.State,
+		Reward: uint64(jsonObj.Reward),
+	}
+	return nil
+}
diff --git a/mocks/Client.go b/mocks/Client.go
index 0ef12c9e..514ba277 100644
--- a/mocks/Client.go
+++ b/mocks/Client.go
@@ -5,10 +5,10 @@ package mocks
 import (
 	context "context"
 
-	indexer "github.com/nervosnetwork/ckb-sdk-go/indexer"
+	indexer "github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
 	mock "github.com/stretchr/testify/mock"
 
-	types "github.com/nervosnetwork/ckb-sdk-go/types"
+	types "github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 // Client is an autogenerated mock type for the Client type
@@ -158,7 +158,6 @@ func (_m *Client) DryRunTransaction(ctx context.Context, transaction *types.Tran
 	return r0, r1
 }
 
-
 // GetBannedAddresses provides a mock function with given fields: ctx
 func (_m *Client) GetBannedAddresses(ctx context.Context) ([]*types.BannedAddress, error) {
 	ret := _m.Called(ctx)
diff --git a/rpc/client.go b/rpc/client.go
index 7bf88f20..e1f957b1 100644
--- a/rpc/client.go
+++ b/rpc/client.go
@@ -3,13 +3,13 @@ package rpc
 import (
 	"context"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
 	"reflect"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/rpc"
 
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 var (
diff --git a/rpc/client_test.go b/rpc/client_test.go
index 9d89d3ef..c2159560 100644
--- a/rpc/client_test.go
+++ b/rpc/client_test.go
@@ -3,7 +3,7 @@ package rpc
 import (
 	"context"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/transaction/context.go b/transaction/context.go
index 537ec55a..0a8db1de 100644
--- a/transaction/context.go
+++ b/transaction/context.go
@@ -1,7 +1,7 @@
 package transaction
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
 	"github.com/pkg/errors"
 )
 
diff --git a/transaction/script_group.go b/transaction/script_group.go
index 0f62234e..35ac1f0a 100644
--- a/transaction/script_group.go
+++ b/transaction/script_group.go
@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"strings"
 )
 
@@ -67,4 +67,4 @@ func (r *ScriptGroup) UnmarshalJSON(input []byte) error {
 		OutputIndices: toUint32Array(jsonObj.OutputIndices),
 	}
 	return nil
-}
\ No newline at end of file
+}
diff --git a/transaction/signer/any_can_pay.go b/transaction/signer/any_can_pay.go
index 8556acb7..b6014d4e 100644
--- a/transaction/signer/any_can_pay.go
+++ b/transaction/signer/any_can_pay.go
@@ -1,9 +1,9 @@
 package signer
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type AnyCanPaySigner struct {
diff --git a/transaction/signer/pw_lock.go b/transaction/signer/pw_lock.go
index 64577a42..c82f540c 100644
--- a/transaction/signer/pw_lock.go
+++ b/transaction/signer/pw_lock.go
@@ -3,9 +3,9 @@ package signer
 import (
 	"bytes"
 	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"strconv"
 )
 
diff --git a/transaction/signer/secp256k1_blake160_multisig_all.go b/transaction/signer/secp256k1_blake160_multisig_all.go
index 592ee101..ac64fceb 100644
--- a/transaction/signer/secp256k1_blake160_multisig_all.go
+++ b/transaction/signer/secp256k1_blake160_multisig_all.go
@@ -3,10 +3,10 @@ package signer
 import (
 	"bytes"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"reflect"
 )
 
diff --git a/transaction/signer/secp256k1_blake160_sighash_all.go b/transaction/signer/secp256k1_blake160_sighash_all.go
index dd2cb660..7a2dffdc 100644
--- a/transaction/signer/secp256k1_blake160_sighash_all.go
+++ b/transaction/signer/secp256k1_blake160_sighash_all.go
@@ -3,10 +3,10 @@ package signer
 import (
 	"bytes"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type Secp256k1Blake160SighashAllSigner struct {
diff --git a/transaction/signer/signer.go b/transaction/signer/signer.go
index 54aae889..c4830320 100644
--- a/transaction/signer/signer.go
+++ b/transaction/signer/signer.go
@@ -2,9 +2,9 @@ package signer
 
 import (
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 type ScriptSigner interface {
@@ -122,7 +122,7 @@ func checkScriptGroup(group *transaction.ScriptGroup) error {
 	}
 	switch group.GroupType {
 	case transaction.ScriptTypeType:
-		if len(group.OutputIndices) + len(group.InputIndices) < 0 {
+		if len(group.OutputIndices)+len(group.InputIndices) < 0 {
 			return errors.New("groupType is Type but OutputIndices and InputIndices are empty")
 		}
 	case transaction.ScriptTypeLock:
@@ -133,4 +133,4 @@ func checkScriptGroup(group *transaction.ScriptGroup) error {
 		return errors.New("unknown group type " + string(group.GroupType))
 	}
 	return nil
-}
\ No newline at end of file
+}
diff --git a/transaction/signer/signer_test.go b/transaction/signer/signer_test.go
index 3f43c3ea..e4be65d3 100644
--- a/transaction/signer/signer_test.go
+++ b/transaction/signer/signer_test.go
@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/transaction"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/transaction"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"io/ioutil"
 	"runtime/debug"
@@ -197,4 +197,4 @@ func (r *signerChecker) UnmarshalJSON(input []byte) error {
 		r.Contexts.Add(ctx)
 	}
 	return nil
-}
\ No newline at end of file
+}
diff --git a/transaction/transaction.go b/transaction/transaction.go
index 86c200c8..b1c86ff3 100644
--- a/transaction/transaction.go
+++ b/transaction/transaction.go
@@ -3,10 +3,10 @@ package transaction
 import (
 	"encoding/binary"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto"
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 )
 
 var (
diff --git a/transaction/transaction_test.go b/transaction/transaction_test.go
index 5afe64a4..4215f73c 100644
--- a/transaction/transaction_test.go
+++ b/transaction/transaction_test.go
@@ -3,10 +3,10 @@ package transaction
 import (
 	"context"
 	"github.com/ethereum/go-ethereum/common"
-	s "github.com/nervosnetwork/ckb-sdk-go/crypto/secp256k1"
-	"github.com/nervosnetwork/ckb-sdk-go/mocks"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
-	"github.com/nervosnetwork/ckb-sdk-go/utils"
+	s "github.com/nervosnetwork/ckb-sdk-go/v2/crypto/secp256k1"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/mocks"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/types/chain.go b/types/chain.go
index 5babb569..28c1a2f7 100644
--- a/types/chain.go
+++ b/types/chain.go
@@ -1,8 +1,8 @@
 package types
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/crypto/blake2b"
-	"github.com/nervosnetwork/ckb-sdk-go/utils/amount"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/crypto/blake2b"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/utils/amount"
 	"math/big"
 )
 
diff --git a/types/json.go b/types/json.go
index f9489f53..9bbdd268 100644
--- a/types/json.go
+++ b/types/json.go
@@ -510,8 +510,8 @@ func (r *RemoteNode) UnmarshalJSON(input []byte) error {
 	type RemoteAlias RemoteNode
 	var jsonObj struct {
 		RemoteAlias
-		ConnectedDuration hexutil.Uint64 `json:"connected_duration"`
-		LastPingDuration  hexutil.Uint64 `json:"last_ping_duration,omitempty"`
+		ConnectedDuration hexutil.Uint64  `json:"connected_duration"`
+		LastPingDuration  *hexutil.Uint64 `json:"last_ping_duration,omitempty"`
 	}
 	if err := json.Unmarshal(input, &jsonObj); err != nil {
 		return err
@@ -522,10 +522,12 @@ func (r *RemoteNode) UnmarshalJSON(input []byte) error {
 		Addresses:         jsonObj.Addresses,
 		IsOutbound:        jsonObj.IsOutbound,
 		ConnectedDuration: uint64(jsonObj.ConnectedDuration),
-		LastPingDuration:  uint64(jsonObj.LastPingDuration),
 		SyncState:         jsonObj.SyncState,
 		Protocols:         jsonObj.Protocols,
 	}
+	if jsonObj.LastPingDuration != nil {
+		r.LastPingDuration = uint64(*jsonObj.LastPingDuration)
+	}
 	return nil
 }
 
diff --git a/types/molecule.go b/types/molecule.go
index e91b44aa..7f643a60 100644
--- a/types/molecule.go
+++ b/types/molecule.go
@@ -2,7 +2,7 @@ package types
 
 import (
 	"encoding/binary"
-	"github.com/nervosnetwork/ckb-sdk-go/molecule"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/molecule"
 )
 
 func (r *WitnessArgs) Pack() *molecule.WitnessArgs {
diff --git a/types/serialize.go b/types/serialize.go
index 44a2b614..87d5690c 100644
--- a/types/serialize.go
+++ b/types/serialize.go
@@ -3,7 +3,7 @@ package types
 import (
 	"errors"
 	"fmt"
-	"github.com/nervosnetwork/ckb-sdk-go/molecule"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/molecule"
 )
 
 func SerializeUint32(n uint32) []byte {
diff --git a/utils/cheque_cell.go b/utils/cheque_cell.go
index 7865ae15..7fcaea52 100644
--- a/utils/cheque_cell.go
+++ b/utils/cheque_cell.go
@@ -1,6 +1,6 @@
 package utils
 
-import "github.com/nervosnetwork/ckb-sdk-go/types"
+import "github.com/nervosnetwork/ckb-sdk-go/v2/types"
 
 func ChequeCellArgs(senderLock, receiverLock *types.Script) ([]byte, error) {
 	senderLockHash, err := senderLock.Hash()
diff --git a/utils/cheque_cell_test.go b/utils/cheque_cell_test.go
index ab1a7be9..0b29990e 100644
--- a/utils/cheque_cell_test.go
+++ b/utils/cheque_cell_test.go
@@ -2,7 +2,7 @@ package utils
 
 import (
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/utils/system.go b/utils/system.go
index 06f94db5..781c5ecb 100644
--- a/utils/system.go
+++ b/utils/system.go
@@ -4,8 +4,8 @@ import (
 	"context"
 	"github.com/pkg/errors"
 
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 )
 
 const (
diff --git a/utils/system_test.go b/utils/system_test.go
index 2b3287fb..23144e1a 100644
--- a/utils/system_test.go
+++ b/utils/system_test.go
@@ -2,8 +2,8 @@ package utils
 
 import (
 	"context"
-	"github.com/nervosnetwork/ckb-sdk-go/mocks"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/mocks"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )
diff --git a/utils/util.go b/utils/util.go
index 9771212a..5a8a8224 100644
--- a/utils/util.go
+++ b/utils/util.go
@@ -3,9 +3,9 @@ package utils
 import (
 	"context"
 	"errors"
-	"github.com/nervosnetwork/ckb-sdk-go/indexer"
-	"github.com/nervosnetwork/ckb-sdk-go/rpc"
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/indexer"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/rpc"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"math/big"
 	"regexp"
 	"strconv"
diff --git a/utils/util_test.go b/utils/util_test.go
index 773dc809..516362b6 100644
--- a/utils/util_test.go
+++ b/utils/util_test.go
@@ -1,7 +1,7 @@
 package utils
 
 import (
-	"github.com/nervosnetwork/ckb-sdk-go/types"
+	"github.com/nervosnetwork/ckb-sdk-go/v2/types"
 	"github.com/stretchr/testify/assert"
 	"math/big"
 	"testing"