diff --git a/README b/README
index 0214e49315..b65a08d425 100644
--- a/README
+++ b/README
@@ -134,7 +134,7 @@ Prerequisites
 The following software packages are *required* for this software to
 run correctly.
 
-- PHP 5.2.x. It may be possible to run this software on earlier
+- PHP 5.2.3+. It may be possible to run this software on earlier
   versions of PHP, but many of the functions used are only available
   in PHP 5.2 or above.
 - MySQL 5.x. The Laconica database is stored, by default, in a MySQL
diff --git a/install.php b/install.php
index 570b08edf4..8f500259ef 100644
--- a/install.php
+++ b/install.php
@@ -43,8 +43,8 @@ function checkPrereqs()
         $pass = false;
     }
 
-    if (version_compare(PHP_VERSION, '5.0.0', '<')) {
-            ?><p class="error">Require PHP version 5 or greater.</p><?php
+    if (version_compare(PHP_VERSION, '5.2.3', '<')) {
+            ?><p class="error">Require PHP version 5.2.3 or greater.</p><?php
 		    $pass = false;
     }