diff --git a/org/homelinux/largo/games/board/Board.java b/org/homelinux/largo/games/board/Board.java
--- a/org/homelinux/largo/games/board/Board.java
+++ b/org/homelinux/largo/games/board/Board.java
@@ -14,7 +14,7 @@
 import javax.swing.JPanel;
 
 public class Board extends JPanel {
-    static final long serialVersionUID = 140208;
+    static final long serialVersionUID = 1L;
 
     protected boolean UNDO_DEBUG = false;