diff --git a/simplelog/simplelog.go b/simplelog/simplelog.go
index aaa6606..a8a88c3 100644
--- a/simplelog/simplelog.go
+++ b/simplelog/simplelog.go
@@ -19,7 +19,7 @@ func (l LogLevel) String() string {
 	return l.s
 }
 
-type LevelFlag uint8
+type LevelFlag int
 
 const (
 	FlagInfo  LevelFlag = 0x1
@@ -127,6 +127,7 @@ var defaultOption = &Option{
 	LevelFlag:  FlagInfo | FlagWarn | FlagError | FlagDebug,
 }
 
+// NewOption 构造 Option 参数
 func NewOption(opts ...OptionFunc) (opt *Option) {
 	opt = defaultOption
 	for _, o := range opts {