diff --git a/pkg/pid/pidfile.go b/pkg/pid/pidfile.go
index 8dca41c49..fedd86542 100644
--- a/pkg/pid/pidfile.go
+++ b/pkg/pid/pidfile.go
@@ -10,9 +10,9 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strconv"
 	"sync"
 	"time"
-	"strconv"
 
 	"github.com/sipeed/picoclaw/pkg/config"
 	"github.com/sipeed/picoclaw/pkg/logger"