diff --git a/src/docs/user/installation_guide.diviner b/src/docs/user/installation_guide.diviner
--- a/src/docs/user/installation_guide.diviner
+++ b/src/docs/user/installation_guide.diviner
@@ -80,7 +80,7 @@
   - **MySQL**: You need MySQL. We strongly recommend MySQL 5.5 or newer.
     You will need a server with multiple databases.
   - **PHP**: You need a PHP engine:
-    - PHP 7 - 7.2 or newer.
+    - PHP 7 - 7.2.25 or newer.
     - PHP 8 - 8.0 or newer.
   - **git**: You need git 2.5.0 or newer on the server.
     No particular version is needed on your clients.
diff --git a/support/startup/PhabricatorStartup.php b/support/startup/PhabricatorStartup.php
--- a/support/startup/PhabricatorStartup.php
+++ b/support/startup/PhabricatorStartup.php
@@ -535,7 +535,7 @@
    * @task validation
    */
   private static function verifyPHP() {
-    $required_version = '5.2.3';
+    $required_version = '7.2.25';
     if (version_compare(PHP_VERSION, $required_version) < 0) {
       self::didFatal(
         "You are running PHP version '".PHP_VERSION."', which is older than ".