diff --git a/src/wp-admin/includes/class-core-upgrader.php b/src/wp-admin/includes/class-core-upgrader.php
index 21fa2c7328..0a7e43363b 100644
--- a/src/wp-admin/includes/class-core-upgrader.php
+++ b/src/wp-admin/includes/class-core-upgrader.php
@@ -1,14 +1,10 @@
 <?php
 /**
- * Upgrade API: WP_Upgrader, Plugin_Upgrader, Theme_Upgrader, Language_Pack_Upgrader,
- * Core_Upgrader, File_Upload_Upgrader, and WP_Automatic_Updater classes
- *
- * This set of classes are designed to be used to upgrade/install a local set of files
- * on the filesystem via the Filesystem Abstraction classes.
+ * Upgrade API: Core_Upgrader class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
diff --git a/src/wp-admin/includes/class-file-upload-upgrader.php b/src/wp-admin/includes/class-file-upload-upgrader.php
index b3c09f77ba..d9e40063b4 100644
--- a/src/wp-admin/includes/class-file-upload-upgrader.php
+++ b/src/wp-admin/includes/class-file-upload-upgrader.php
@@ -1,14 +1,10 @@
 <?php
 /**
- * Upgrade API: WP_Upgrader, Plugin_Upgrader, Theme_Upgrader, Language_Pack_Upgrader,
- * Core_Upgrader, File_Upload_Upgrader, and WP_Automatic_Updater classes
- *
- * This set of classes are designed to be used to upgrade/install a local set of files
- * on the filesystem via the Filesystem Abstraction classes.
+ * Upgrade API: File_Upload_Upgrader class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
diff --git a/src/wp-admin/includes/class-language-pack-upgrader.php b/src/wp-admin/includes/class-language-pack-upgrader.php
index 150056cde6..ad3aa30833 100644
--- a/src/wp-admin/includes/class-language-pack-upgrader.php
+++ b/src/wp-admin/includes/class-language-pack-upgrader.php
@@ -1,14 +1,10 @@
 <?php
 /**
- * Upgrade API: WP_Upgrader, Plugin_Upgrader, Theme_Upgrader, Language_Pack_Upgrader,
- * Core_Upgrader, File_Upload_Upgrader, and WP_Automatic_Updater classes
- *
- * This set of classes are designed to be used to upgrade/install a local set of files
- * on the filesystem via the Filesystem Abstraction classes.
+ * Upgrade API: Language_Pack_Upgrader class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
diff --git a/src/wp-admin/includes/class-plugin-upgrader.php b/src/wp-admin/includes/class-plugin-upgrader.php
index 7fec925b52..743fb797df 100644
--- a/src/wp-admin/includes/class-plugin-upgrader.php
+++ b/src/wp-admin/includes/class-plugin-upgrader.php
@@ -1,14 +1,10 @@
 <?php
 /**
- * Upgrade API: WP_Upgrader, Plugin_Upgrader, Theme_Upgrader, Language_Pack_Upgrader,
- * Core_Upgrader, File_Upload_Upgrader, and WP_Automatic_Updater classes
- *
- * This set of classes are designed to be used to upgrade/install a local set of files
- * on the filesystem via the Filesystem Abstraction classes.
+ * Upgrade API: Plugin_Upgrader class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
diff --git a/src/wp-admin/includes/class-theme-upgrader.php b/src/wp-admin/includes/class-theme-upgrader.php
index 8c6831d25f..8a49476d03 100644
--- a/src/wp-admin/includes/class-theme-upgrader.php
+++ b/src/wp-admin/includes/class-theme-upgrader.php
@@ -1,14 +1,10 @@
 <?php
 /**
- * Upgrade API: WP_Upgrader, Plugin_Upgrader, Theme_Upgrader, Language_Pack_Upgrader,
- * Core_Upgrader, File_Upload_Upgrader, and WP_Automatic_Updater classes
- *
- * This set of classes are designed to be used to upgrade/install a local set of files
- * on the filesystem via the Filesystem Abstraction classes.
+ * Upgrade API: Theme_Upgrader class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**
diff --git a/src/wp-admin/includes/class-wp-automatic-upgrader.php b/src/wp-admin/includes/class-wp-automatic-upgrader.php
index a109f07bc5..fcbb2603f7 100644
--- a/src/wp-admin/includes/class-wp-automatic-upgrader.php
+++ b/src/wp-admin/includes/class-wp-automatic-upgrader.php
@@ -1,14 +1,10 @@
 <?php
 /**
- * Upgrade API: WP_Upgrader, Plugin_Upgrader, Theme_Upgrader, Language_Pack_Upgrader,
- * Core_Upgrader, File_Upload_Upgrader, and WP_Automatic_Updater classes
- *
- * This set of classes are designed to be used to upgrade/install a local set of files
- * on the filesystem via the Filesystem Abstraction classes.
+ * Upgrade API: WP_Automatic_Updater class
  *
  * @package WordPress
  * @subpackage Upgrader
- * @since 2.8.0
+ * @since 4.6.0
  */
 
 /**