diff --git a/wp-includes/class-wp-theme.php b/wp-includes/class-wp-theme.php
index d9368317ae..124ee11524 100644
--- a/wp-includes/class-wp-theme.php
+++ b/wp-includes/class-wp-theme.php
@@ -1189,8 +1189,8 @@ final class WP_Theme implements ArrayAccess {
 	 *
 	 * @since 4.7.0
 	 *
-	 * @return string Array of page templates, keyed by filename and post type,
-	 *               with the value of the translated header name.
+	 * @return string[] Array of page templates, keyed by filename and post type,
+	 *                  with the value of the translated header name.
 	 */
 	public function get_post_templates() {
 		// If you screw up your current theme and we invalidate your parent, most things still work. Let it slide.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 281ec1f5d3..e26ed83219 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-47628';
+$wp_version = '5.5-alpha-47631';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.