diff --git a/wp-includes/vars.php b/wp-includes/vars.php
index 74a9cef032..b719b48d2e 100644
--- a/wp-includes/vars.php
+++ b/wp-includes/vars.php
@@ -127,11 +127,11 @@ $is_apache = ( str_contains( $_SERVER['SERVER_SOFTWARE'], 'Apache' ) || str_cont
 $is_nginx = ( str_contains( $_SERVER['SERVER_SOFTWARE'], 'nginx' ) );
 
 /**
- * Whether the server software is Caddy or something else.
+ * Whether the server software is Caddy / FrankenPHP or something else.
  *
  * @global bool $is_caddy
  */
-$is_caddy = ( str_contains( $_SERVER['SERVER_SOFTWARE'], 'Caddy' ) );
+$is_caddy = ( str_contains( $_SERVER['SERVER_SOFTWARE'], 'Caddy' ) || str_contains( $_SERVER['SERVER_SOFTWARE'], 'FrankenPHP' ) );
 
 /**
  * Whether the server software is IIS or something else.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e2ba1dab69..519d2ede42 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-57922';
+$wp_version = '6.6-alpha-57923';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.