diff --git a/backup/backup_version.php b/backup/backup_version.php
index a0c13353058..0a9c8281626 100644
--- a/backup/backup_version.php
+++ b/backup/backup_version.php
@@ -5,6 +5,6 @@
 // database (backup_version) to determine whether upgrades should
 // be performed (see db/backup_*.php)
 
-$backup_version = 2003060100;   // The current version is a date (YYYYMMDDXX)
+$backup_version = 2003061000;   // The current version is a date (YYYYMMDDXX)
 
-$backup_release = "0.5.0 alpha";  // User-friendly version number
+$backup_release = "0.5.5 alpha";  // User-friendly version number