diff --git a/bitfinex/restauth/api.go b/bitfinex/restauth/api.go
index 27623e7..f08eaeb 100644
--- a/bitfinex/restauth/api.go
+++ b/bitfinex/restauth/api.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package bitfinexrestauth
+package restauth
 
 import (
 	"context"
diff --git a/bitfinex/restauth/client.go b/bitfinex/restauth/client.go
index 6016041..c5c22c1 100644
--- a/bitfinex/restauth/client.go
+++ b/bitfinex/restauth/client.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package bitfinexrestauth
+package restauth
 
 import (
 	"bytes"
diff --git a/bitfinex/restauth/client_test.go b/bitfinex/restauth/client_test.go
index 5e10810..695a93c 100644
--- a/bitfinex/restauth/client_test.go
+++ b/bitfinex/restauth/client_test.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package bitfinexrestauth
+package restauth
 
 import (
 	"context"
diff --git a/bitfinex/restpub/api.go b/bitfinex/restpub/api.go
index ece1833..72bd38e 100644
--- a/bitfinex/restpub/api.go
+++ b/bitfinex/restpub/api.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package bitfinexrestpub
+package restpub
 
 import (
 	"context"
diff --git a/bitfinex/restpub/client.go b/bitfinex/restpub/client.go
index 72978f9..40f82ac 100644
--- a/bitfinex/restpub/client.go
+++ b/bitfinex/restpub/client.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package bitfinexrestpub
+package restpub
 
 import (
 	"bytes"
diff --git a/bitfinex/restpub/client_test.go b/bitfinex/restpub/client_test.go
index 52dc943..684ec80 100644
--- a/bitfinex/restpub/client_test.go
+++ b/bitfinex/restpub/client_test.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package bitfinexrestpub
+package restpub
 
 import (
 	"context"
diff --git a/mexc/contract/account/client.go b/mexc/contract/account/client.go
index 71d690f..40d1332 100644
--- a/mexc/contract/account/client.go
+++ b/mexc/contract/account/client.go
@@ -25,11 +25,11 @@ import (
 
 	"github.com/go-playground/validator"
 	"github.com/linstohu/nexapi/mexc/contract/account/types"
-	ctutils "github.com/linstohu/nexapi/mexc/contract/utils"
+	"github.com/linstohu/nexapi/mexc/contract/utils"
 )
 
 type ContractAccountClient struct {
-	*ctutils.ContractClient
+	*utils.ContractClient
 
 	// validate struct fields
 	validate *validator.Validate
@@ -46,7 +46,7 @@ type ContractAccountClientCfg struct {
 	RecvWindow int
 }
 
-func NewContractAccountClient(cfg *ctutils.ContractClientCfg) (*ContractAccountClient, error) {
+func NewContractAccountClient(cfg *utils.ContractClientCfg) (*ContractAccountClient, error) {
 	validator := validator.New()
 
 	err := validator.Struct(cfg)
@@ -54,7 +54,7 @@ func NewContractAccountClient(cfg *ctutils.ContractClientCfg) (*ContractAccountC
 		return nil, err
 	}
 
-	cli, err := ctutils.NewContractClient(&ctutils.ContractClientCfg{
+	cli, err := utils.NewContractClient(&utils.ContractClientCfg{
 		Debug:      cfg.Debug,
 		Logger:     cfg.Logger,
 		BaseURL:    cfg.BaseURL,
@@ -73,7 +73,7 @@ func NewContractAccountClient(cfg *ctutils.ContractClientCfg) (*ContractAccountC
 }
 
 func (c *ContractAccountClient) GetAccountAsset(ctx context.Context) (*types.GetAccountAsset, error) {
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: c.GetBaseURL(),
 		Path:    "/api/v1/private/account/assets",
 		Method:  http.MethodGet,
@@ -106,7 +106,7 @@ func (c *ContractAccountClient) GetOpenPositions(ctx context.Context, param type
 		return nil, err
 	}
 
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: c.GetBaseURL(),
 		Path:    "/api/v1/private/position/open_positions",
 		Method:  http.MethodGet,
@@ -140,7 +140,7 @@ func (c *ContractAccountClient) GetPositionLeverage(ctx context.Context, param t
 		return nil, err
 	}
 
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: c.GetBaseURL(),
 		Path:    "/api/v1/private/position/leverage",
 		Method:  http.MethodGet,
@@ -174,7 +174,7 @@ func (c *ContractAccountClient) SetPositionLeverage(ctx context.Context, param t
 		return nil, err
 	}
 
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: c.GetBaseURL(),
 		Path:    "/api/v1/private/position/change_leverage",
 		Method:  http.MethodPost,
diff --git a/mexc/contract/account/client_test.go b/mexc/contract/account/client_test.go
index 3fca630..2bce45c 100644
--- a/mexc/contract/account/client_test.go
+++ b/mexc/contract/account/client_test.go
@@ -22,13 +22,13 @@ import (
 	"os"
 	"testing"
 
-	ctutils "github.com/linstohu/nexapi/mexc/contract/utils"
+	"github.com/linstohu/nexapi/mexc/contract/utils"
 	"github.com/stretchr/testify/assert"
 )
 
 func testNewAccountClient(t *testing.T) *ContractAccountClient {
-	cli, err := NewContractAccountClient(&ctutils.ContractClientCfg{
-		BaseURL: ctutils.BaseURL,
+	cli, err := NewContractAccountClient(&utils.ContractClientCfg{
+		BaseURL: utils.BaseURL,
 		Key:     os.Getenv("MEXC_KEY"),
 		Secret:  os.Getenv("MEXC_SECRET"),
 		Debug:   true,
diff --git a/mexc/contract/marketdata/client.go b/mexc/contract/marketdata/client.go
index 3362ae4..3205fb2 100644
--- a/mexc/contract/marketdata/client.go
+++ b/mexc/contract/marketdata/client.go
@@ -24,18 +24,18 @@ import (
 
 	"github.com/go-playground/validator"
 	"github.com/linstohu/nexapi/mexc/contract/marketdata/types"
-	ctutils "github.com/linstohu/nexapi/mexc/contract/utils"
+	"github.com/linstohu/nexapi/mexc/contract/utils"
 )
 
 type ContractMarketDataClient struct {
-	*ctutils.ContractClient
+	*utils.ContractClient
 
 	// validate struct fields
 	validate *validator.Validate
 }
 
-func NewContractMarketDataClient(cfg *ctutils.ContractClientCfg) (*ContractMarketDataClient, error) {
-	cli, err := ctutils.NewContractClient(cfg)
+func NewContractMarketDataClient(cfg *utils.ContractClientCfg) (*ContractMarketDataClient, error) {
+	cli, err := utils.NewContractClient(cfg)
 	if err != nil {
 		return nil, err
 	}
@@ -49,7 +49,7 @@ func NewContractMarketDataClient(cfg *ctutils.ContractClientCfg) (*ContractMarke
 }
 
 func (s *ContractMarketDataClient) GetServerTime(ctx context.Context) (*types.ServerTime, error) {
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: s.GetBaseURL(),
 		Path:    "/api/v1/contract/ping",
 		Method:  http.MethodGet,
@@ -75,7 +75,7 @@ func (s *ContractMarketDataClient) GetServerTime(ctx context.Context) (*types.Se
 }
 
 func (s *ContractMarketDataClient) GetContractDetails(ctx context.Context, param types.GetContractDetailsParams) (*types.GetContractDetailsResp, error) {
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: s.GetBaseURL(),
 		Path:    "/api/v1/contract/detail",
 		Method:  http.MethodGet,
@@ -107,7 +107,7 @@ func (s *ContractMarketDataClient) GetTickerForSymbol(ctx context.Context, param
 		return nil, err
 	}
 
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: s.GetBaseURL(),
 		Path:    "/api/v1/contract/ticker",
 		Method:  http.MethodGet,
@@ -138,7 +138,7 @@ func (s *ContractMarketDataClient) GetTickerForSymbol(ctx context.Context, param
 }
 
 func (s *ContractMarketDataClient) GetTickerForAllSymbols(ctx context.Context) (*types.GetAllTickersResp, error) {
-	req := ctutils.HTTPRequest{
+	req := utils.HTTPRequest{
 		BaseURL: s.GetBaseURL(),
 		Path:    "/api/v1/contract/ticker",
 		Method:  http.MethodGet,
diff --git a/mexc/contract/marketdata/client_test.go b/mexc/contract/marketdata/client_test.go
index 6934cf1..0327c45 100644
--- a/mexc/contract/marketdata/client_test.go
+++ b/mexc/contract/marketdata/client_test.go
@@ -22,13 +22,13 @@ import (
 	"testing"
 
 	"github.com/linstohu/nexapi/mexc/contract/marketdata/types"
-	ctutils "github.com/linstohu/nexapi/mexc/contract/utils"
+	"github.com/linstohu/nexapi/mexc/contract/utils"
 	"github.com/stretchr/testify/assert"
 )
 
 func testNewContractMarketDataClient(t *testing.T) *ContractMarketDataClient {
-	cli, err := NewContractMarketDataClient(&ctutils.ContractClientCfg{
-		BaseURL: ctutils.BaseURL,
+	cli, err := NewContractMarketDataClient(&utils.ContractClientCfg{
+		BaseURL: utils.BaseURL,
 		Debug:   true,
 	})
 
diff --git a/mexc/contract/utils/client.go b/mexc/contract/utils/client.go
index 4e58938..bd9d328 100644
--- a/mexc/contract/utils/client.go
+++ b/mexc/contract/utils/client.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package ctutils
+package utils
 
 import (
 	"bytes"
diff --git a/mexc/contract/utils/request.go b/mexc/contract/utils/request.go
index f8debd9..60e3dff 100644
--- a/mexc/contract/utils/request.go
+++ b/mexc/contract/utils/request.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package ctutils
+package utils
 
 type HTTPRequest struct {
 	BaseURL string
diff --git a/mexc/contract/utils/vars.go b/mexc/contract/utils/vars.go
index 3766c42..7908df6 100644
--- a/mexc/contract/utils/vars.go
+++ b/mexc/contract/utils/vars.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package ctutils
+package utils
 
 var (
 	BaseURL = "https://contract.mexc.com"
diff --git a/okx/tradingaccount/client.go b/okx/tradingaccount/client.go
index 6964da7..edf7d44 100644
--- a/okx/tradingaccount/client.go
+++ b/okx/tradingaccount/client.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package publicdata
+package tradingaccount
 
 import (
 	"context"
diff --git a/okx/tradingaccount/client_test.go b/okx/tradingaccount/client_test.go
index e247b12..10d7a6d 100644
--- a/okx/tradingaccount/client_test.go
+++ b/okx/tradingaccount/client_test.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package publicdata
+package tradingaccount
 
 import (
 	"context"
@@ -23,14 +23,14 @@ import (
 	"testing"
 
 	"github.com/linstohu/nexapi/okx/tradingaccount/types"
-	okxutils "github.com/linstohu/nexapi/okx/utils"
+	"github.com/linstohu/nexapi/okx/utils"
 	"github.com/stretchr/testify/assert"
 )
 
 func testNewTradingAccountClient(t *testing.T) *TradingAccountClient {
 	cli, err := NewTradingAccountClient(&TradingAccountClientCfg{
 		Debug:      true,
-		BaseURL:    okxutils.RestURL,
+		BaseURL:    utils.RestURL,
 		Key:        os.Getenv("OKX_KEY"),
 		Secret:     os.Getenv("OKX_SECRET"),
 		Passphrase: os.Getenv("OKX_PASS"),
diff --git a/okx/utils/request.go b/okx/utils/request.go
index f34620d..2fdd560 100644
--- a/okx/utils/request.go
+++ b/okx/utils/request.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package okxutils
+package utils
 
 type Response struct {
 	Code    string `json:"code"`
diff --git a/okx/utils/rest.go b/okx/utils/rest.go
index 7a4df55..42456ad 100644
--- a/okx/utils/rest.go
+++ b/okx/utils/rest.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package okxutils
+package utils
 
 import (
 	"bytes"
diff --git a/okx/utils/vars.go b/okx/utils/vars.go
index 5e78e99..773c53f 100644
--- a/okx/utils/vars.go
+++ b/okx/utils/vars.go
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package okxutils
+package utils
 
 var (
 	RestURL      = "https://www.okx.com"