diff --git a/core/INSTALL.txt b/core/INSTALL.txt
index 99aeb33b4e8..4abfa253343 100644
--- a/core/INSTALL.txt
+++ b/core/INSTALL.txt
@@ -17,7 +17,7 @@ Drupal requires:
 - A web server with PHP support, for example:
   - Apache 2.0 (or greater) (http://httpd.apache.org/).
   - Nginx 1.1 (or greater) (http://www.nginx.com/).
-- PHP 5.3.5 (or greater) (http://www.php.net/).
+- PHP 5.3.10 (or greater) (http://www.php.net/).
 - One of the following databases:
   - MySQL 5.0.15 (or greater) (http://www.mysql.com/).
   - MariaDB 5.1.44 (or greater) (http://mariadb.org/). MariaDB is a fully
diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index a3a0f4636a4..faee5748660 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -35,7 +35,7 @@ const DRUPAL_CORE_COMPATIBILITY = '8.x';
 /**
  * Minimum supported version of PHP.
  */
-const DRUPAL_MINIMUM_PHP = '5.3.5';
+const DRUPAL_MINIMUM_PHP = '5.3.10';
 
 /**
  * Minimum recommended value of PHP memory_limit.