diff --git a/installer/rcube_install.php b/installer/rcube_install.php
index 530be3ebe..6ef105bc7 100644
--- a/installer/rcube_install.php
+++ b/installer/rcube_install.php
@@ -452,6 +452,7 @@ class rcube_install
         '0.6-beta', '0.6',
         '0.7-beta', '0.7', '0.7.1', '0.7.2', '0.7.3',
         '0.8-beta', '0.8-rc', '0.8.0', '0.8.1', '0.8.2', '0.8.3', '0.8.4',
+        '0.9-beta',
     ));
     return $select;
   }