diff --git a/app/src/main/java/com/kabouzeid/gramophone/model/PlaylistSong.java b/app/src/main/java/com/kabouzeid/gramophone/model/PlaylistSong.java
index 694d4e17..6b59ea49 100644
--- a/app/src/main/java/com/kabouzeid/gramophone/model/PlaylistSong.java
+++ b/app/src/main/java/com/kabouzeid/gramophone/model/PlaylistSong.java
@@ -1,6 +1,9 @@
 package com.kabouzeid.gramophone.model;
 
 public class PlaylistSong extends Song {
+
+    private static final long serialVersionUID = 1098600801627571043L;
+
     public final int playlistId;
     public int idInPlayList;
 
diff --git a/app/src/main/java/com/kabouzeid/gramophone/model/Song.java b/app/src/main/java/com/kabouzeid/gramophone/model/Song.java
index 58007c3d..0c4903dc 100644
--- a/app/src/main/java/com/kabouzeid/gramophone/model/Song.java
+++ b/app/src/main/java/com/kabouzeid/gramophone/model/Song.java
@@ -7,6 +7,8 @@ import java.io.Serializable;
  */
 public class Song implements Serializable {
 
+    private static final long serialVersionUID = 3720703366054566981L;
+
     public int id;
     public final int albumId;
     public final int artistId;