diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 0e80484412d31a041924330a3e68b78c198e0ee3..4c1a34508705c2ec396e548fb571d38924ccb3e8 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,5 +1,8 @@
 // $Id$
 
+Drupal 5.23-dev, xxxx-xx-xx
+-----------------------
+
 Drupal 5.22, 2010-03-03
 -----------------------
 - Fixed security issues (Open redirection, Locale module cross site scripting,
diff --git a/modules/system/system.module b/modules/system/system.module
index 30d386174f67e51f34328e9f243fff54440eb292..2026c9197e7eb72d6a48625d6398126cb4e68135 100644
--- a/modules/system/system.module
+++ b/modules/system/system.module
@@ -6,7 +6,7 @@
  * Configuration system that lets administrators modify the workings of the site.
  */
 
-define('VERSION', '5.22');
+define('VERSION', '5.23-dev');
 
 /**
  * Implementation of hook_help().