diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index b86bc25a29..7741c9a0c4 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -445,7 +445,7 @@ function wp_default_styles( &$styles ) {
 	// all colors stylesheets need to have the same query strings (cache manifest compat)
 	$colors_version = '20100217';
 
-	$styles->add( 'wp-admin', "/wp-admin/css/wp-admin$suffix.css", array(), '20100222' );
+	$styles->add( 'wp-admin', "/wp-admin/css/wp-admin$suffix.css", array(), '20100318' );
 
 	$styles->add( 'ie', "/wp-admin/css/ie$suffix.css", array(), '20100219' );
 	$styles->add_data( 'ie', 'conditional', 'lte IE 7' );