diff --git a/log.go b/log.go
index 101c708..9fda52f 100644
--- a/log.go
+++ b/log.go
@@ -30,9 +30,8 @@ type logger struct {
 	mu *sync.RWMutex
 
 	isDiscard uint32
-	aLevel    int32
 
-	level        Level
+	level        int32
 	prefix       string
 	timeFunc     TimeFunction
 	timeFormat   string
@@ -53,7 +52,7 @@ func New(opts ...LoggerOption) Logger {
 	l := &logger{
 		b:     bytes.Buffer{},
 		mu:    &sync.RWMutex{},
-		level: InfoLevel,
+		level: int32(InfoLevel),
 	}
 
 	for _, opt := range opts {
@@ -65,7 +64,7 @@ func New(opts ...LoggerOption) Logger {
 	}
 
 	l.SetOutput(l.w)
-	l.SetLevel(l.level)
+	l.SetLevel(Level(l.level))
 
 	if l.timeFunc == nil {
 		l.timeFunc = time.Now
@@ -84,7 +83,7 @@ func (l *logger) log(level Level, msg interface{}, keyvals ...interface{}) {
 	}
 
 	// check if the level is allowed
-	if atomic.LoadInt32(&l.aLevel) > int32(level) {
+	if atomic.LoadInt32(&l.level) > int32(level) {
 		return
 	}
 
@@ -225,15 +224,14 @@ func (l *logger) SetReportCaller(report bool) {
 func (l *logger) GetLevel() Level {
 	l.mu.RLock()
 	defer l.mu.RUnlock()
-	return l.level
+	return Level(l.level)
 }
 
 // SetLevel sets the current level.
 func (l *logger) SetLevel(level Level) {
 	l.mu.Lock()
 	defer l.mu.Unlock()
-	l.level = level
-	atomic.StoreInt32(&l.aLevel, int32(level))
+	atomic.StoreInt32(&l.level, int32(level))
 }
 
 // GetPrefix returns the current prefix.
diff --git a/log_test.go b/log_test.go
index 21da2dc..4c85f86 100644
--- a/log_test.go
+++ b/log_test.go
@@ -47,3 +47,31 @@ func TestSubLogger(t *testing.T) {
 		})
 	}
 }
+
+func TestWrongLevel(t *testing.T) {
+	var buf bytes.Buffer
+	cases := []struct {
+		name     string
+		expected string
+		level    Level
+	}{
+		{
+			name:     "wrong level",
+			expected: "",
+			level:    Level(999),
+		},
+		{
+			name:     "wrong level negative",
+			expected: "INFO info\n",
+			level:    Level(-999),
+		},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			buf.Reset()
+			l := New(WithOutput(&buf), WithLevel(c.level))
+			l.Info("info")
+			assert.Equal(t, c.expected, buf.String())
+		})
+	}
+}
diff --git a/options.go b/options.go
index 5b5483e..a1581df 100644
--- a/options.go
+++ b/options.go
@@ -30,7 +30,7 @@ func WithTimeFormat(format string) LoggerOption {
 // default is InfoLevel.
 func WithLevel(level Level) LoggerOption {
 	return func(l *logger) {
-		l.level = level
+		l.level = int32(level)
 	}
 }