diff --git a/src/wp-admin/about.php b/src/wp-admin/about.php
index 1ce28fef89..7f78acc768 100644
--- a/src/wp-admin/about.php
+++ b/src/wp-admin/about.php
@@ -376,3 +376,9 @@ _n_noop(
 
 /* translators: %s: Documentation URL. */
 __( 'For more information, see <a href="%s">the release notes</a>.' );
+
+/* translators: 1: WordPress version number, 2: Link to update WordPress */
+__( 'Important! Your version of WordPress (%1$s) is no longer supported, you will not receive any security updates for your website. To keep your site secure, please <a href="%2$s">update to the latest version of WordPress</a>.' );
+
+/* translators: 1: WordPress version number, 2: Link to update WordPress */
+__( 'Important! Your version of WordPress (%1$s) will stop receiving security updates in the near future. To keep your site secure, please <a href="%2$s">update to the latest version of WordPress</a>.' );