diff --git a/wp-admin/network/themes.php b/wp-admin/network/themes.php
index 27e8db8857..86747337d5 100644
--- a/wp-admin/network/themes.php
+++ b/wp-admin/network/themes.php
@@ -375,7 +375,7 @@ if ( isset( $_GET['enabled'] ) ) {
 		/* translators: %s: Number of themes. */
 		$message = _n( '%s theme enabled.', '%s themes enabled.', $enabled );
 	}
-	echo '<div id="message" class="notice notice-updated is-dismissible"><p>' . sprintf( $message, number_format_i18n( $enabled ) ) . '</p></div>';
+	echo '<div id="message" class="notice notice-success is-dismissible"><p>' . sprintf( $message, number_format_i18n( $enabled ) ) . '</p></div>';
 } elseif ( isset( $_GET['disabled'] ) ) {
 	$disabled = absint( $_GET['disabled'] );
 	if ( 1 === $disabled ) {
@@ -384,7 +384,7 @@ if ( isset( $_GET['enabled'] ) ) {
 		/* translators: %s: Number of themes. */
 		$message = _n( '%s theme disabled.', '%s themes disabled.', $disabled );
 	}
-	echo '<div id="message" class="notice notice-updated is-dismissible"><p>' . sprintf( $message, number_format_i18n( $disabled ) ) . '</p></div>';
+	echo '<div id="message" class="notice notice-success is-dismissible"><p>' . sprintf( $message, number_format_i18n( $disabled ) ) . '</p></div>';
 } elseif ( isset( $_GET['deleted'] ) ) {
 	$deleted = absint( $_GET['deleted'] );
 	if ( 1 === $deleted ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 27d075fbfc..5167c4eed1 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.3-alpha-55633';
+$wp_version = '6.3-alpha-55637';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.