diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index 2819d4d31f..c137896384 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -4,7 +4,7 @@
  *
  * 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.
  *
- * @link http://trac.wordpress.org/ticket/7875 consolidate plugin/theme/core upgrade/install functions
+ * @link https://core.trac.wordpress.org/ticket/7875 consolidate plugin/theme/core upgrade/install functions
  *
  * @package WordPress
  * @subpackage Upgrader
diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php
index 209b5c9408..bad5e9fded 100644
--- a/wp-admin/includes/plugin.php
+++ b/wp-admin/includes/plugin.php
@@ -60,8 +60,8 @@
  * the file. This is not checked however and the file is only opened for
  * reading.
  *
- * @link http://trac.wordpress.org/ticket/5651 Previous Optimizations.
- * @link http://trac.wordpress.org/ticket/7372 Further and better Optimizations.
+ * @link https://core.trac.wordpress.org/ticket/5651 Previous Optimizations.
+ * @link https://core.trac.wordpress.org/ticket/7372 Further and better Optimizations.
  * @since 1.5.0
  *
  * @param string $plugin_file Path to the plugin file
diff --git a/wp-includes/canonical.php b/wp-includes/canonical.php
index c1b90251cf..107979246f 100644
--- a/wp-includes/canonical.php
+++ b/wp-includes/canonical.php
@@ -69,8 +69,8 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
 		return;
 
 	// Some PHP setups turn requests for / into /index.php in REQUEST_URI
-	// See: http://trac.wordpress.org/ticket/5017
-	// See: http://trac.wordpress.org/ticket/7173
+	// See: https://core.trac.wordpress.org/ticket/5017
+	// See: https://core.trac.wordpress.org/ticket/7173
 	// Disabled, for now:
 	// $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']);
 
diff --git a/wp-includes/class-http.php b/wp-includes/class-http.php
index dc0615b814..d925a07b54 100644
--- a/wp-includes/class-http.php
+++ b/wp-includes/class-http.php
@@ -5,7 +5,7 @@
  * Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
  * decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
  *
- * @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
+ * @link https://core.trac.wordpress.org/ticket/4779 HTTP API Proposal
  *
  * @package WordPress
  * @subpackage HTTP
diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index bf31d14a56..886ffc6e6c 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -571,7 +571,7 @@ function wp_register( $before = '<li>', $after = '</li>', $echo = true ) {
  *
  * @since 1.5.0
  *
- * @link http://trac.wordpress.org/ticket/1458 Explanation of 'wp_meta' action.
+ * @link https://core.trac.wordpress.org/ticket/1458 Explanation of 'wp_meta' action.
  */
 function wp_meta() {
 	/**
diff --git a/wp-includes/http.php b/wp-includes/http.php
index 3a5f4ada90..539bc8f33b 100644
--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -4,7 +4,7 @@
  *
  * Will eventually replace and standardize the WordPress HTTP requests made.
  *
- * @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
+ * @link https://core.trac.wordpress.org/ticket/4779 HTTP API Proposal
  *
  * @package WordPress
  * @subpackage HTTP
diff --git a/wp-includes/pluggable.php b/wp-includes/pluggable.php
index d7c609c52f..7a816ccd32 100644
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -360,7 +360,7 @@ function wp_mail( $to, $subject, $message, $headers = '', $attachments = array()
 	 * Some hosts will block outgoing mail from this address if it doesn't exist but
 	 * there's no easy alternative. Defaulting to admin_email might appear to be another
 	 * option but some hosts may refuse to relay mail from an unknown domain. See
-	 * http://trac.wordpress.org/ticket/5007.
+	 * https://core.trac.wordpress.org/ticket/5007.
 	 */
 
 	if ( !isset( $from_email ) ) {
diff --git a/wp-includes/plugin.php b/wp-includes/plugin.php
index d616a2a960..3c51a9b8f9 100644
--- a/wp-includes/plugin.php
+++ b/wp-includes/plugin.php
@@ -865,7 +865,7 @@ function _wp_call_all_hook($args) {
  * Functions and static method callbacks are just returned as strings and
  * shouldn't have any speed penalty.
  *
- * @link http://trac.wordpress.org/ticket/3875
+ * @link https://core.trac.wordpress.org/ticket/3875
  *
  * @since 2.2.3
  * @access private