diff --git a/demo/relay/main.go b/demo/relay/main.go
index b8e642d..74500e1 100644
--- a/demo/relay/main.go
+++ b/demo/relay/main.go
@@ -20,7 +20,7 @@ func main() {
 	}
 	defer r.Close()
 
-	for i := 0; i < 4; i++ {
+	for i := range 4 {
 		func(num int) {
 			r.On(num)
 			defer r.Off(num)
diff --git a/internal/routes/play/card_pusher/device.go b/internal/routes/play/card_pusher/device.go
index 603d868..8ae152a 100644
--- a/internal/routes/play/card_pusher/device.go
+++ b/internal/routes/play/card_pusher/device.go
@@ -51,12 +51,12 @@ func (d *Device) statusEventHandler(evt gpiocdev.LineEvent) {
 // initStatus 读取初始状态
 func (d *Device) initStatus() error {
 	offsets := d.inLines.Offsets()
-	status := make([]int, len(offsets), len(offsets))
+	status := make([]int, len(offsets))
 	err := d.inLines.Values(status)
 	if err != nil {
 		return err
 	}
-	for i := 0; i < len(status); i++ {
+	for i := range status {
 		d.status[offsets[i]] = DefaultStatusLine(status[i])
 	}
 
diff --git a/pkg/card_reader/reader.go b/pkg/card_reader/reader.go
index 3d658c8..bca4ad4 100644
--- a/pkg/card_reader/reader.go
+++ b/pkg/card_reader/reader.go
@@ -101,7 +101,7 @@ func (r *reader) GetCardInfo() *CardInfo {
 	}
 
 	s := make([]string, dataLength)
-	for i := 0; i < int(dataLength); i++ {
+	for i := range s {
 		s[i] = fmt.Sprintf("%02X", cardData[i])
 	}