diff --git a/README.md b/README.md
index 3dcb4ef..66bdb32 100644
--- a/README.md
+++ b/README.md
@@ -200,8 +200,8 @@ freq_alert = false
 
 # 日志配置
 [logging]
-  # 开启日志记录
-  enable = false
+  # 开启日志记录（程序异常时会记录关键信息，不建议关闭）
+  enable = true
   # 默认值：Linux/MacOS为/tmp/kd_<username>.log，windows为%TMPDIR%/kd_<username>.log
   path = ""
   # 日志级别，支持：DEBUG/INFO/WARN/PANIC/FATAL
diff --git a/cmd/kd.go b/cmd/kd.go
index 400ae3b..eef6a3b 100644
--- a/cmd/kd.go
+++ b/cmd/kd.go
@@ -121,8 +121,7 @@ func flagUpdate(ctx *cli.Context, _ bool) (err error) {
 
 	if doUpdate {
 		// emoji.Println(":lightning: Let's update now")
-		err = daemon.KillDaemonIfRunning()
-		if err != nil {
+		if err = daemon.KillDaemonIfRunning(); err != nil {
 			warnMsg := "可能会影响后续文件替换。如果出现问题，请手动执行`kd --stop`后重试"
 			d.EchoWarn("停止守护进程出现异常（%s），%s", err, warnMsg)
 			if p, perr := daemon.FindServerProcess(); perr == nil {
@@ -272,7 +271,14 @@ func main() {
 		if err != nil {
 			d.EchoFatal(err.Error())
 		}
-		defer l.Sync()
+		defer func() {
+			if r := recover(); r != nil {
+				zap.S().Errorln("Application crashed", zap.Any("reason", r))
+				if syncErr := l.Sync(); syncErr != nil {
+					fmt.Printf("Failed to sync logger: %v\n", syncErr)
+				}
+			}
+		}()
 	}
 	zap.S().Debugf("Got configuration: %+v", cfg)
 	zap.S().Debugf("Got run info: %+v", run.Info)
diff --git a/config/config.go b/config/config.go
index 2855289..ce2ce97 100644
--- a/config/config.go
+++ b/config/config.go
@@ -22,7 +22,7 @@ var CONFIG_PATH string
 type LoggerConfig struct {
 	Enable           bool   `default:"true" toml:"enable"`
 	Path             string `toml:"path"`
-	Level            string `default:"info" toml:"level"`
+	Level            string `default:"warn" toml:"level"`
 	Stderr           bool   `default:"false" toml:"stderr"`
 	RedirectToStream bool   `default:"false" toml:"redirect_to_stream"`
 }
diff --git a/logger/logger.go b/logger/logger.go
index 82688df..21a3795 100644
--- a/logger/logger.go
+++ b/logger/logger.go
@@ -2,6 +2,7 @@ package logger
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"os/user"
 	"path/filepath"
@@ -22,8 +23,7 @@ func buildLogger(logCfg *config.LoggerConfig, options ...zap.Option) (*zap.Logge
 	} else {
 		var f string
 		if logCfg.Path == "" {
-			u, err := user.Current()
-			if err != nil {
+			if u, err := user.Current(); err != nil {
 				f = filepath.Join(os.TempDir(), "kd.log")
 			} else {
 				name := strings.ReplaceAll(u.Username, " ", "_")
@@ -52,10 +52,9 @@ func buildLogger(logCfg *config.LoggerConfig, options ...zap.Option) (*zap.Logge
 func InitLogger(logCfg *config.LoggerConfig) (*zap.Logger, error) {
 	l, err := buildLogger(logCfg)
 	if err != nil {
-		panic(err)
+		log.Panicln(err)
 	}
 
 	zap.ReplaceGlobals(l)
-
 	return l, err
 }