diff --git a/readme.html b/readme.html
index b2334bf70e..924056775b 100644
--- a/readme.html
+++ b/readme.html
@@ -70,7 +70,7 @@
 		<dd>The Codex is the encyclopedia of all things WordPress. It is the most comprehensive source of information for WordPress available.</dd>
 	<dt><a href="https://wordpress.org/news/">The WordPress Blog</a></dt>
 		<dd>This is where you&#8217;ll find the latest updates and news related to WordPress. Recent WordPress news appears in your administrative dashboard by default.</dd>
-	<dt><a href="http://planet.wordpress.org/">WordPress Planet</a></dt>
+	<dt><a href="https://planet.wordpress.org/">WordPress Planet</a></dt>
 		<dd>The WordPress Planet is a news aggregator that brings together posts from WordPress blogs around the web.</dd>
 	<dt><a href="https://wordpress.org/support/">WordPress Support Forums</a></dt>
 		<dd>If you&#8217;ve looked everywhere and still can&#8217;t find an answer, the support forums are very active and have a large community ready to help. To help them help you be sure to use a descriptive thread title and describe your question in as much detail as possible.</dd>
diff --git a/wp-admin/includes/dashboard.php b/wp-admin/includes/dashboard.php
index 6e6afb2595..a1ad29c917 100644
--- a/wp-admin/includes/dashboard.php
+++ b/wp-admin/includes/dashboard.php
@@ -967,7 +967,7 @@ function wp_dashboard_primary() {
 			 *
 			 * @param string $link The widget's secondary link URL.
 			 */
-			'link' => apply_filters( 'dashboard_secondary_link', __( 'http://planet.wordpress.org/' ) ),
+			'link' => apply_filters( 'dashboard_secondary_link', __( 'https://planet.wordpress.org/' ) ),
 
 			/**
 			 * Filter the secondary feed URL for the 'WordPress News' dashboard widget.
@@ -976,7 +976,7 @@ function wp_dashboard_primary() {
 			 *
 			 * @param string $url The widget's secondary feed URL.
 			 */
-			'url' => apply_filters( 'dashboard_secondary_feed', __( 'http://planet.wordpress.org/feed/' ) ),
+			'url' => apply_filters( 'dashboard_secondary_feed', __( 'https://planet.wordpress.org/feed/' ) ),
 
 			/**
 			 * Filter the secondary link title for the 'WordPress News' dashboard widget.
diff --git a/wp-admin/index.php b/wp-admin/index.php
index 3bd4c7c012..029ee5557d 100644
--- a/wp-admin/index.php
+++ b/wp-admin/index.php
@@ -69,9 +69,9 @@ if ( current_user_can( 'edit_posts' ) )
 if ( is_blog_admin() && current_user_can( 'edit_posts' ) )
 	$help .= '<p>' . __( "<strong>Quick Draft</strong> - Allows you to create a new post and save it as a draft. Also displays links to the 5 most recent draft posts you've started." ) . '</p>';
 if ( ! is_multisite() && current_user_can( 'install_plugins' ) )
-	$help .= '<p>' . __( '<strong>WordPress News</strong> - Latest news from the official WordPress project, the <a href="http://planet.wordpress.org/">WordPress Planet</a>, and popular and recent plugins.' ) . '</p>';
+	$help .= '<p>' . __( '<strong>WordPress News</strong> - Latest news from the official WordPress project, the <a href="https://planet.wordpress.org/">WordPress Planet</a>, and popular and recent plugins.' ) . '</p>';
 else
-	$help .= '<p>' . __( '<strong>WordPress News</strong> - Latest news from the official WordPress project, the <a href="http://planet.wordpress.org/">WordPress Planet</a>.' ) . '</p>';
+	$help .= '<p>' . __( '<strong>WordPress News</strong> - Latest news from the official WordPress project, the <a href="https://planet.wordpress.org/">WordPress Planet</a>.' ) . '</p>';
 if ( current_user_can( 'edit_theme_options' ) )
 	$help .= '<p>' . __( '<strong>Welcome</strong> - Shows links for some of the most common tasks when setting up a new site.' ) . '</p>';