diff --git a/server/ctrlsubsonic/spec/construct_by_folder.go b/server/ctrlsubsonic/spec/construct_by_folder.go
index ecde20e..f6ab207 100644
--- a/server/ctrlsubsonic/spec/construct_by_folder.go
+++ b/server/ctrlsubsonic/spec/construct_by_folder.go
@@ -19,10 +19,11 @@ func NewAlbumByFolder(f *model.Album) *Album {
 
 func NewTCAlbumByFolder(f *model.Album) *TrackChild {
 	trCh := &TrackChild{
-		ID:       f.ID,
-		IsDir:    true,
-		Title:    f.RightPath,
-		ParentID: f.ParentID,
+		ID:        f.ID,
+		IsDir:     true,
+		Title:     f.RightPath,
+		ParentID:  f.ParentID,
+		CreatedAt: f.UpdatedAt,
 	}
 	if f.Cover != "" {
 		trCh.CoverID = f.ID
@@ -46,11 +47,12 @@ func NewTCTrackByFolder(t *model.Track, parent *model.Album) *TrackChild {
 			parent.RightPath,
 			t.Filename,
 		),
-		ParentID: parent.ID,
-		Duration: t.Length,
-		Bitrate:  t.Bitrate,
-		IsDir:    false,
-		Type:     "music",
+		ParentID:  parent.ID,
+		Duration:  t.Length,
+		Bitrate:   t.Bitrate,
+		IsDir:     false,
+		Type:      "music",
+		CreatedAt: t.CreatedAt,
 	}
 	if parent.Cover != "" {
 		trCh.CoverID = parent.ID
diff --git a/server/ctrlsubsonic/spec/spec.go b/server/ctrlsubsonic/spec/spec.go
index eb66ce7..98132ff 100644
--- a/server/ctrlsubsonic/spec/spec.go
+++ b/server/ctrlsubsonic/spec/spec.go
@@ -109,8 +109,8 @@ type TrackChild struct {
 	Duration    int       `xml:"duration,attr,omitempty"    json:"duration,omitempty"`
 	Genre       string    `xml:"genre,attr,omitempty"       json:"genre,omitempty"`
 	ID          int       `xml:"id,attr,omitempty"          json:"id,omitempty"`
-	IsDir       bool      `xml:"isDir,attr,omitempty"       json:"isDir,omitempty"`
-	IsVideo     bool      `xml:"isVideo,attr,omitempty"     json:"isVideo,omitempty"`
+	IsDir       bool      `xml:"isDir,attr"                 json:"isDir"`
+	IsVideo     bool      `xml:"isVideo,attr"               json:"isVideo"`
 	ParentID    int       `xml:"parent,attr,omitempty"      json:"parent,omitempty"`
 	Path        string    `xml:"path,attr,omitempty"        json:"path,omitempty"`
 	Size        int       `xml:"size,attr,omitempty"        json:"size,omitempty"`