diff --git a/archive.php b/archive.php
index 3013ef30..796ca6a5 100644
--- a/archive.php
+++ b/archive.php
@@ -2,7 +2,7 @@
 /**
  * The template for displaying archive pages
  *
- * Learn more: http://codex.wordpress.org/Template_Hierarchy
+ * Learn more: https://developer.wordpress.org/themes/basics/template-hierarchy/
  *
  * @package Understrap
  */
diff --git a/inc/class-wp-bootstrap-navwalker.php b/inc/class-wp-bootstrap-navwalker.php
index c8d5967f..096b6e3f 100644
--- a/inc/class-wp-bootstrap-navwalker.php
+++ b/inc/class-wp-bootstrap-navwalker.php
@@ -19,7 +19,7 @@ defined( 'ABSPATH' ) || exit;
  * GitHub Plugin URI: https://github.com/wp-bootstrap/wp-bootstrap-navwalker
  * GitHub Branch: master
  * License: GPL-3.0+
- * License URI: http://www.gnu.org/licenses/gpl-3.0.txt
+ * License URI: https://www.gnu.org/licenses/gpl-3.0.txt
  */
 
 /* Check if Class Exists. */
diff --git a/inc/setup.php b/inc/setup.php
index 420e39fa..8f74d60d 100644
--- a/inc/setup.php
+++ b/inc/setup.php
@@ -79,7 +79,7 @@ if ( ! function_exists( 'understrap_setup' ) ) {
 
 		/*
 		 * Enable support for Post Formats.
-		 * See http://codex.wordpress.org/Post_Formats
+		 * See https://wordpress.org/support/article/post-formats/
 		 */
 		add_theme_support(
 			'post-formats',
diff --git a/index.php b/index.php
index 26041211..243b1545 100644
--- a/index.php
+++ b/index.php
@@ -6,7 +6,7 @@
  * and one of the two required files for a theme (the other being style.css).
  * It is used to display a page when nothing more specific matches a query.
  * E.g., it puts together the home page when no home.php file exists.
- * Learn more: http://codex.wordpress.org/Template_Hierarchy
+ * Learn more: https://developer.wordpress.org/themes/basics/template-hierarchy/
  *
  * @package Understrap
  */
diff --git a/loop-templates/content-none.php b/loop-templates/content-none.php
index 34c4d16e..d8a7b39c 100644
--- a/loop-templates/content-none.php
+++ b/loop-templates/content-none.php
@@ -2,7 +2,7 @@
 /**
  * The template part for displaying a message that posts cannot be found
  *
- * Learn more: http://codex.wordpress.org/Template_Hierarchy
+ * Learn more: https://developer.wordpress.org/themes/basics/template-hierarchy/
  *
  * @package Understrap
  */
diff --git a/readme.txt b/readme.txt
index 10d2c79a..4d9b53af 100644
--- a/readme.txt
+++ b/readme.txt
@@ -5,7 +5,7 @@ Requires at least: 5.0
 Tested up to: 5.7.2
 Requires PHP: 5.2
 License: GNU General Public License v3 or later
-License URI: http://www.gnu.org/licenses/gpl-3.0.html
+License URI: https://www.gnu.org/licenses/gpl-3.0.html
 
 == Description ==
 
@@ -49,5 +49,5 @@ This theme bundles the following third-party resources:
 
 * Underscores: https://github.com/Automattic/_s/blob/master/LICENSE (GNU GPLv2)
 * Font Awesome: https://fontawesome.com/v4.7/license/ (Font: SIL OFL 1.1, (S)CSS: MIT)
-* Bootstrap: http://getbootstrap.com | https://github.com/twbs/bootstrap/blob/master/LICENSE (MIT)
+* Bootstrap: https://getbootstrap.com | https://github.com/twbs/bootstrap/blob/master/LICENSE (MIT)
 * WP Bootstrap Navwalker by Edward McIntyre & William Patton: https://github.com/wp-bootstrap/wp-bootstrap-navwalker (GNU GPLv3)
diff --git a/style.css b/style.css
index 907c43cd..4d14a519 100644
--- a/style.css
+++ b/style.css
@@ -10,7 +10,7 @@ Requires at least: 5.0
 Tested up to: 6.1
 Requires PHP: 5.2
 License: GNU General Public License v3 or later
-License URI: http://www.gnu.org/licenses/gpl-3.0.html
+License URI: https://www.gnu.org/licenses/gpl-3.0.html
 Text Domain: understrap
 Tags: one-column, two-columns, three-columns, left-sidebar, right-sidebar, custom-background, custom-logo, custom-menu, featured-images, footer-widgets, full-width-template, theme-options, translation-ready, block-styles, wide-blocks, editor-style, threaded-comments, accessibility-ready