Updated libraries.

app/src/main/java/com/kabouzeid/gramophone/adapter/song/PlayingQueueAdapter.java

@@ -110,6 +110,11 @@ public class PlayingQueueAdapter extends SongAdapter implements DraggableItemAda
         MusicPlayerRemote.moveSong(fromPosition, toPosition);
     }
 
+    @Override
+    public boolean onCheckCanDrop(int draggingPosition, int dropPosition) {
+        return true;
+    }
+
     public class ViewHolder extends SongAdapter.ViewHolder implements DraggableItemViewHolder {
         @DraggableItemStateFlags
         private int mDragStateFlags;

app/src/main/java/com/kabouzeid/gramophone/adapter/song/PlaylistSongAdapter.java

@@ -75,6 +75,11 @@ public class PlaylistSongAdapter extends SongAdapter implements DraggableItemAda
         }
     }
 
+    @Override
+    public boolean onCheckCanDrop(int draggingPosition, int dropPosition) {
+        return true;
+    }
+
     public interface OnMoveItemListener {
         void onMoveItem(int fromPosition, int toPosition);
     }