use a 4 digit number

version.php

@@ -1,7 +1,7 @@
 <?php
 
 // We only can count up. Reset minor/patchlevel when updating major/minor version number.
-$OC_Version=array(5, 80, 8);
+$OC_Version=array(5, 80, 8, 0);
 
 // The human radable string
 $OC_VersionString='6.0 pre alpha';