diff --git a/core/config.go b/core/config.go
index a40b9f2..78c4b4c 100644
--- a/core/config.go
+++ b/core/config.go
@@ -216,7 +216,7 @@ func parseParams(subCommand string) {
 	daemonMode := fset.Bool("d", false, "daemonMode")
 	notVerbose := fset.Bool("nv", false, "not log console")
 	newconfig := fset.Bool("newconfig", false, "not load existing config.json")
-	logLevel := fset.Int("loglevel", 0, "0:info 1:warn 2:error 3:debug")
+	logLevel := fset.Int("loglevel", 1, "0:debug 1:info 2:warn 3:error")
 	if subCommand == "" { // no subcommand
 		fset.Parse(os.Args[1:])
 	} else {
diff --git a/core/openp2p.go b/core/openp2p.go
index e00b805..cdd9023 100644
--- a/core/openp2p.go
+++ b/core/openp2p.go
@@ -21,7 +21,6 @@ func Run() {
 			fmt.Println(OpenP2PVersion)
 			return
 		case "update":
-			gLog = NewLogger(baseDir, ProductName, LvDEBUG, 1024*1024, LogFileAndConsole)
 			targetPath := filepath.Join(defaultInstallPath, defaultBinName)
 			d := daemon{}
 			err := d.Control("restart", targetPath, nil)