diff -u b/core/INSTALL.txt b/core/INSTALL.txt
--- b/core/INSTALL.txt
+++ b/core/INSTALL.txt
@@ -22,10 +22,10 @@
   recommended to update to at least 5.5.21 or 5.6.5.
 - One of the following databases:
   - MySQL 5.5.3 (or greater) (http://www.mysql.com/).
-  - MariaDB 5.5.3 (or greater) (https://mariadb.org/). MariaDB is a fully
+  - MariaDB 5.5.20 (or greater) (https://mariadb.org/). MariaDB is a fully
     compatible drop-in replacement for MySQL.
-  - Percona Server 5.5.3 (or greater) (http://www.percona.com/). Percona Server
-    is a backwards-compatible replacement for MySQL.
+  - Percona Server 5.5.8 (or greater) (http://www.percona.com/). Percona
+    Server is a backwards-compatible replacement for MySQL.
   - PostgreSQL 8.3 (or greater) (http://www.postgresql.org/).
   - SQLite 3.4.2 (or greater) (http://www.sqlite.org/).