diff --git a/admin/cli/install.php b/admin/cli/install.php
index ca8aaef07bc..35db018fd7f 100644
--- a/admin/cli/install.php
+++ b/admin/cli/install.php
@@ -131,10 +131,10 @@ define('MOODLE_INTERNAL', true);
 define('CACHE_DISABLE_ALL', true);
 
 // Check that PHP is of a sufficient version
-if (version_compare(phpversion(), "5.3.2") < 0) {
+if (version_compare(phpversion(), "5.3.3") < 0) {
     $phpversion = phpversion();
     // do NOT localise - lang strings would not work here and we CAN NOT move it after installib
-    fwrite(STDERR, "Moodle 2.1 or later requires at least PHP 5.3.2 (currently using version $phpversion).\n");
+    fwrite(STDERR, "Moodle 2.5 or later requires at least PHP 5.3.3 (currently using version $phpversion).\n");
     fwrite(STDERR, "Please upgrade your server software or install older Moodle version.\n");
     exit(1);
 }
diff --git a/admin/cli/install_database.php b/admin/cli/install_database.php
index 313f3521d40..27a38aab42c 100644
--- a/admin/cli/install_database.php
+++ b/admin/cli/install_database.php
@@ -55,10 +55,10 @@ Example:
 ";
 
 // Check that PHP is of a sufficient version
-if (version_compare(phpversion(), "5.3.2") < 0) {
+if (version_compare(phpversion(), "5.3.3") < 0) {
     $phpversion = phpversion();
     // do NOT localise - lang strings would not work here and we CAN NOT move it after installib
-    fwrite(STDERR, "Moodle 2.1 or later requires at least PHP 5.3.2 (currently using version $phpversion).\n");
+    fwrite(STDERR, "Moodle 2.5 or later requires at least PHP 5.3.3 (currently using version $phpversion).\n");
     fwrite(STDERR, "Please upgrade your server software or install older Moodle version.\n");
     exit(1);
 }
diff --git a/admin/index.php b/admin/index.php
index def20d29ecd..9c1a9132400 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -30,10 +30,10 @@ if (!file_exists('../config.php')) {
 }
 
 // Check that PHP is of a sufficient version as soon as possible
-if (version_compare(phpversion(), '5.3.2') < 0) {
+if (version_compare(phpversion(), '5.3.3') < 0) {
     $phpversion = phpversion();
     // do NOT localise - lang strings would not work here and we CAN NOT move it to later place
-    echo "Moodle 2.1 or later requires at least PHP 5.3.2 (currently using version $phpversion).<br />";
+    echo "Moodle 2.5 or later requires at least PHP 5.3.3 (currently using version $phpversion).<br />";
     echo "Please upgrade your server software or install older Moodle version.";
     die();
 }
diff --git a/install.php b/install.php
index 8c5bcf746fb..96e626966fb 100644
--- a/install.php
+++ b/install.php
@@ -58,10 +58,10 @@ if (function_exists('date_default_timezone_set') and function_exists('date_defau
 @ini_set('display_errors', '1');
 
 // Check that PHP is of a sufficient version.
-if (version_compare(phpversion(), '5.3.2') < 0) {
+if (version_compare(phpversion(), '5.3.3') < 0) {
     $phpversion = phpversion();
     // do NOT localise - lang strings would not work here and we CAN not move it after installib
-    echo "Moodle 2.1 or later requires at least PHP 5.3.2 (currently using version $phpversion).<br />";
+    echo "Moodle 2.5 or later requires at least PHP 5.3.3 (currently using version $phpversion).<br />";
     echo "Please upgrade your server software or install older Moodle version.";
     die;
 }
@@ -490,7 +490,7 @@ if ($config->stage == INSTALL_DATABASETYPE) {
 
 
 if ($config->stage == INSTALL_ENVIRONMENT or $config->stage == INSTALL_PATHS) {
-    $version_fail = (version_compare(phpversion(), "5.3.2") < 0);
+    $version_fail = (version_compare(phpversion(), "5.3.3") < 0);
     $curl_fail    = ($lang !== 'en' and !extension_loaded('curl')); // needed for lang pack download
     $zip_fail     = ($lang !== 'en' and !extension_loaded('zip'));  // needed for lang pack download
 
@@ -503,7 +503,7 @@ if ($config->stage == INSTALL_ENVIRONMENT or $config->stage == INSTALL_PATHS) {
 
         echo '<div id="envresult"><dl>';
         if ($version_fail) {
-            $a = (object)array('needed'=>'5.3.2', 'current'=>phpversion());
+            $a = (object)array('needed'=>'5.3.3', 'current'=>phpversion());
             echo '<dt>'.get_string('phpversion', 'install').'</dt><dd>'.get_string('environmentrequireversion', 'admin', $a).'</dd>';
         }
         if ($curl_fail) {
diff --git a/lib/setup.php b/lib/setup.php
index 00721c6151a..5524a79873d 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -251,10 +251,10 @@ if (file_exists("$CFG->dataroot/climaintenance.html")) {
 
 if (CLI_SCRIPT) {
     // sometimes people use different PHP binary for web and CLI, make 100% sure they have the supported PHP version
-    if (version_compare(phpversion(), '5.3.2') < 0) {
+    if (version_compare(phpversion(), '5.3.3') < 0) {
         $phpversion = phpversion();
         // do NOT localise - lang strings would not work here and we CAN NOT move it to later place
-        echo "Moodle 2.1 or later requires at least PHP 5.3.2 (currently using version $phpversion).\n";
+        echo "Moodle 2.5 or later requires at least PHP 5.3.3 (currently using version $phpversion).\n";
         echo "Some servers may have multiple PHP versions installed, are you using the correct executable?\n";
         exit(1);
     }