diff --git a/src/readme.html b/src/readme.html
index 37820b60a9..10dcfd1c04 100644
--- a/src/readme.html
+++ b/src/readme.html
@@ -52,7 +52,7 @@
 
 <h2>System Requirements</h2>
 <ul>
-	<li><a href="https://secure.php.net/">PHP</a> version <strong>5.2.4</strong> or higher.</li>
+	<li><a href="https://secure.php.net/">PHP</a> version <strong>5.6.30</strong> or higher.</li>
 	<li><a href="https://www.mysql.com/">MySQL</a> version <strong>5.0</strong> or higher.</li>
 </ul>
 
diff --git a/src/wp-includes/version.php b/src/wp-includes/version.php
index a420646487..b59b3489f2 100644
--- a/src/wp-includes/version.php
+++ b/src/wp-includes/version.php
@@ -34,7 +34,7 @@ $tinymce_version = '4920-20181217';
  *
  * @global string $required_php_version
  */
-$required_php_version = '5.2.4';
+$required_php_version = '5.6.30';
 
 /**
  * Holds the required MySQL version