diff --git a/user_guide_src/source/general/requirements.rst b/user_guide_src/source/general/requirements.rst
index b46733c..d97b7b4 100644
--- a/user_guide_src/source/general/requirements.rst
+++ b/user_guide_src/source/general/requirements.rst
@@ -4,5 +4,5 @@
 
 -  `PHP <http://www.php.net/>`_ version 5.2.4 or newer.
 -  A Database is required for most web application programming. Current
-   supported databases are MySQL (5.1+), MySQLi, MS SQL, PostgreSQL,
-   Oracle, SQLite, SQLite3, ODBC and CUBRID.
+   supported databases are MySQL (5.1+), MySQLi, MS SQL, SQLSRV, Oracle,
+   PostgreSQL, SQLite, SQLite3, CUBRID, Interbase, ODBC and PDO.