diff --git a/.drone.yml b/.drone.yml
index c64fbb7..7722068 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -24,7 +24,7 @@ steps:
     commands:
     - OOS=linux GOARCH=amd64 CGO_ENABLED=1 go build -o tele-recv-linux
     - GOOS=windows GOARCH=amd64 CGO_ENABLED=1 CXX=x86_64-w64-mingw32-g++ CC=x86_64-w64-mingw32-gcc go build -o tele-recv-win64.exe
-    - tar cvzf tele-recv-0.0.7.tar.gz tele-recv-linux tele-recv-win64.exe telegram.yaml
+    - tar cvzf tele-recv-0.0.9.tar.gz tele-recv-linux tele-recv-win64.exe telegram.yaml
 
   - name: release
     image: plugins/gitea-release
@@ -34,9 +34,9 @@ steps:
     settings:
       api_key: fe1e1a8dd77de7452a3f473984c7ac6fe6c5abaf
       base_url: https://gitea.int.it2000.com.cn
-      title: 0.0.7
+      title: 0.0.9
       files:
-        - tele-recv-0.0.7.tar.gz
+        - tele-recv-0.0.8.tar.gz
       checksum:
         - sha256
     when:
diff --git a/cmd/start.go b/cmd/start.go
index 6e98eda..30f41ce 100644
--- a/cmd/start.go
+++ b/cmd/start.go
@@ -85,7 +85,7 @@ func start() {
 	for utils.ServerRunning {
 		if !utils.IsPortOpen() {
 			logger.Info("try to open port")
-			err := utils.OpenPort(device, baudrate, bytesize, stopbits)
+			err := utils.OpenPort(device, baudrate)
 			if err != nil {
 				logger.Fatal("error in open serial port ", zap.Error(err))
 			}
diff --git a/cmd/test.go b/cmd/test.go
index aac5439..521f609 100644
--- a/cmd/test.go
+++ b/cmd/test.go
@@ -34,7 +34,7 @@ Test load sqlite database and init table`,
 
 func test() {
 	logger.Info("Testing environment")
-	_ = utils.OpenPort(device, baudrate, bytesize, stopbits)
+	_ = utils.OpenPort(device, baudrate)
 
 	err := utils.InitDb(dbFile, dbInit)
 	if err != nil {
diff --git a/utils/serial.go b/utils/serial.go
index 7174539..1771829 100644
--- a/utils/serial.go
+++ b/utils/serial.go
@@ -19,7 +19,7 @@ var (
 const readDuration = 500 * time.Millisecond
 
 // OpenPort open serial port
-func OpenPort(device string, baudrate int, bytesize byte, stopbits byte) error {
+func OpenPort(device string, baudrate int) error {
 	Log.Info("opening serial device ",
 		zap.String("port", device),
 		zap.Int("baudrate", baudrate))