diff --git a/index.php b/index.php
index 6684ba38..3d223a2f 100644
--- a/index.php
+++ b/index.php
@@ -1,7 +1,7 @@
 <?php
 // set up and purify the environment
 define("DEBUG", true);
-define("VERSION", 'trunk');
+define("VERSION", '2.2.0-pre1');
 
 if(DEBUG) {
 	error_reporting(E_ALL);