diff --git a/schema/serializer.go b/schema/serializer.go
index 09da6d9e..758a6421 100644
--- a/schema/serializer.go
+++ b/schema/serializer.go
@@ -108,8 +108,8 @@ type UnixSecondSerializer struct {
 // Scan implements serializer interface
 func (UnixSecondSerializer) Scan(ctx context.Context, field *Field, dst reflect.Value, dbValue interface{}) (err error) {
 	t := sql.NullTime{}
-	if err = t.Scan(dbValue); err == nil {
-		err = field.Set(ctx, dst, t.Time)
+	if err = t.Scan(dbValue); err == nil && t.Valid {
+		err = field.Set(ctx, dst, t.Time.Unix())
 	}
 
 	return
@@ -118,8 +118,8 @@ func (UnixSecondSerializer) Scan(ctx context.Context, field *Field, dst reflect.
 // Value implements serializer interface
 func (UnixSecondSerializer) Value(ctx context.Context, field *Field, dst reflect.Value, fieldValue interface{}) (result interface{}, err error) {
 	switch v := fieldValue.(type) {
-	case int64, int, uint, uint64, int32, uint32, int16, uint16:
-		result = time.Unix(reflect.ValueOf(v).Int(), 0)
+	case int64, int, uint, uint64, int32, uint32, int16, uint16, *int64, *int, *uint, *uint64, *int32, *uint32, *int16, *uint16:
+		result = time.Unix(reflect.Indirect(reflect.ValueOf(v)).Int(), 0)
 	default:
 		err = fmt.Errorf("invalid field type %#v for UnixSecondSerializer, only int, uint supported", v)
 	}
diff --git a/tests/serializer_test.go b/tests/serializer_test.go
index ce60280e..ee14841a 100644
--- a/tests/serializer_test.go
+++ b/tests/serializer_test.go
@@ -21,6 +21,7 @@ type SerializerStruct struct {
 	Contracts       map[string]interface{} `gorm:"serializer:json"`
 	JobInfo         Job                    `gorm:"type:bytes;serializer:gob"`
 	CreatedTime     int64                  `gorm:"serializer:unixtime;type:time"` // store time in db, use int as field type
+	UpdatedTime     *int64                 `gorm:"serializer:unixtime;type:time"` // store time in db, use int as field type
 	EncryptedString EncryptedString
 }
 
@@ -58,6 +59,7 @@ func TestSerializer(t *testing.T) {
 	}
 
 	createdAt := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC)
+	updatedAt := createdAt.Unix()
 
 	data := SerializerStruct{
 		Name:            []byte("jinzhu"),
@@ -65,6 +67,7 @@ func TestSerializer(t *testing.T) {
 		Contracts:       map[string]interface{}{"name": "jinzhu", "age": 10},
 		EncryptedString: EncryptedString("pass"),
 		CreatedTime:     createdAt.Unix(),
+		UpdatedTime:     &updatedAt,
 		JobInfo: Job{
 			Title:    "programmer",
 			Number:   9920,