diff --git a/src/readme.html b/src/readme.html
index 4c76fd4c17..f0309df1e9 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>7.0</strong> or greater.</li>
-	<li><a href="https://www.mysql.com/">MySQL</a> version <strong>5.0</strong> or greater.</li>
+	<li><a href="https://www.mysql.com/">MySQL</a> version <strong>5.5.5</strong> or greater.</li>
 </ul>
 
 <h3>Recommendations</h3>
diff --git a/src/wp-includes/version.php b/src/wp-includes/version.php
index ecd665df63..fca28144f5 100644
--- a/src/wp-includes/version.php
+++ b/src/wp-includes/version.php
@@ -44,4 +44,4 @@ $required_php_version = '7.0.0';
  *
  * @global string $required_mysql_version
  */
-$required_mysql_version = '5.0';
+$required_mysql_version = '5.5.5';