--- a/bin/update-serial	Fri Mar 16 15:48:34 2012 +0200
+++ b/bin/update-serial	Fri Mar 16 16:10:21 2012 +0200
@@ -174,7 +174,7 @@
     serial = update_serial(serial)
 
     # write
-    open(path, 'w').write(serial)
+    open(path, 'w').write(serial + '\n')
 
     return serial