diff --git a/pkg/exchange/max/maxapi/account.go b/pkg/exchange/max/maxapi/account.go
index 02b1106a7..26ce9326a 100644
--- a/pkg/exchange/max/maxapi/account.go
+++ b/pkg/exchange/max/maxapi/account.go
@@ -11,7 +11,7 @@ import (
 )
 
 type AccountService struct {
-	client *RestClient
+	client requestgen.AuthenticatedAPIClient
 }
 
 // Account is for max rest api v2, Balance and Type will be conflict with types.PrivateBalanceUpdate
diff --git a/pkg/exchange/max/maxapi/order.go b/pkg/exchange/max/maxapi/order.go
index 004b0737e..fa76096b7 100644
--- a/pkg/exchange/max/maxapi/order.go
+++ b/pkg/exchange/max/maxapi/order.go
@@ -4,6 +4,8 @@ package max
 //go:generate -command PostRequest requestgen -method POST
 
 import (
+	"github.com/c9s/requestgen"
+
 	"github.com/c9s/bbgo/pkg/fixedpoint"
 	"github.com/c9s/bbgo/pkg/types"
 )
@@ -57,7 +59,7 @@ type QueryOrderOptions struct {
 
 // OrderService manages the Order endpoint.
 type OrderService struct {
-	client *RestClient
+	client requestgen.AuthenticatedAPIClient
 }
 
 type SubmitOrder struct {
diff --git a/pkg/exchange/max/maxapi/v3/order.go b/pkg/exchange/max/maxapi/v3/order.go
index 3f5c89f91..df3a63a60 100644
--- a/pkg/exchange/max/maxapi/v3/order.go
+++ b/pkg/exchange/max/maxapi/v3/order.go
@@ -5,6 +5,8 @@ package v3
 //go:generate -command DeleteRequest requestgen -method DELETE
 
 import (
+	"github.com/c9s/requestgen"
+
 	maxapi "github.com/c9s/bbgo/pkg/exchange/max/maxapi"
 )
 
@@ -18,5 +20,5 @@ type Account = maxapi.Account
 
 // OrderService manages the Order endpoint.
 type OrderService struct {
-	Client *maxapi.RestClient
+	Client requestgen.AuthenticatedAPIClient
 }