diff --git a/functions.php b/functions.php
index 443035f3..29482ad0 100644
--- a/functions.php
+++ b/functions.php
@@ -33,7 +33,7 @@ function twentytwentyfour_block_styles() {
 			array(
 				'handle' => 'twentytwentyfour-button-style-outline',
 				'src'    => get_theme_file_uri( 'assets/css/button-outline.css' ),
-				'ver'    => wp_get_theme()->get( 'Version' ),
+				'ver'    => wp_get_theme( 'twentytwentyfour' )->get( 'Version' ),
 				'path'   => get_theme_file_path( 'assets/css/button-outline.css' ),
 			)
 		);