diff --git a/client.go b/client.go
index 6c089ba..9bf9385 100644
--- a/client.go
+++ b/client.go
@@ -88,7 +88,7 @@ func (this *Client) Connect() error {
 }
 
 // GetSecurityList 获取市场内指定范围内的所有证券代码
-func (this *Client) GetSecurityList() (*SecurityListResp, error) {
+func (this *Client) GetSecurityList() (*protocol.SecurityListResp, error) {
 
 	f := protocol.Frame{
 		Control: 0x01,
diff --git a/model.go b/model.go
deleted file mode 100644
index bdad356..0000000
--- a/model.go
+++ /dev/null
@@ -1,4 +0,0 @@
-package tdx
-
-type SecurityListResp struct {
-}