diff --git a/wp-includes/media.php b/wp-includes/media.php
index a8bf034f49..271300958a 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -1498,7 +1498,7 @@ add_shortcode( 'caption', 'img_caption_shortcode' );
  *
  * @since 2.6.0
  * @since 3.9.0 The `class` attribute was added.
- * @since 5.0.0 The `caption_id` attribute was added.
+ * @since 5.1.0 The `caption_id` attribute was added.
  *
  * @param array  $attr {
  *     Attributes of the caption shortcode.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 67355364b8..8afa861d4f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44547';
+$wp_version = '5.1-alpha-44548';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.