diff --git a/README.md b/README.md
index d8b3892..2b18dc3 100644
--- a/README.md
+++ b/README.md
@@ -6,4 +6,4 @@ the [Contributing guide][contrib]! Also, check out the [Style Guide][sg].
 Thanks!
 
 [contrib]: https://github.com/sass/sass-site/blob/main/CONTRIBUTING.md
-[sg]: http://sass-lang.com/styleguide
+[sg]: https://sass-lang.com/styleguide/
diff --git a/source/_includes/footer.liquid b/source/_includes/footer.liquid
index 592227f..b8f514f 100644
--- a/source/_includes/footer.liquid
+++ b/source/_includes/footer.liquid
@@ -1,6 +1,6 @@
 <footer
   class="site-footer contentinfo"
-  itemtype="http://schema.org/WPFooter"
+  itemtype="https://schema.org/WPFooter"
   itemscope="itemscope"
   role="contentinfo">
   <div class="sl-l-container sl-l-section">
diff --git a/source/_includes/header.liquid b/source/_includes/header.liquid
index ade3f98..0ac8fa1 100644
--- a/source/_includes/header.liquid
+++ b/source/_includes/header.liquid
@@ -1,6 +1,6 @@
 <header
   class="sl-r-banner"
-  itemtype="http://schema.org/WPHeader"
+  itemtype="https://schema.org/WPHeader"
   itemscope="itemscope"
   role="banner">
   {% for alert in alerts | default: [] %}
diff --git a/source/_includes/header_nav.md b/source/_includes/header_nav.md
index 55ee9f0..beede58 100644
--- a/source/_includes/header_nav.md
+++ b/source/_includes/header_nav.md
@@ -1,6 +1,6 @@
 <nav
   class="sl-r-banner__navigation sl-l-grid__column sl-l-large-grid sl-l-large-grid__column--auto-size sl-c-list-horizontal-wrapper"
-  itemtype="http://schema.org/SiteNavigationElement"
+  itemtype="https://schema.org/SiteNavigationElement"
   itemscope="itemscope"
   role="navigation"
   aria-label="Site navigation">
diff --git a/source/community-guidelines.md b/source/community-guidelines.md
index 2652140..81fbcfd 100644
--- a/source/community-guidelines.md
+++ b/source/community-guidelines.md
@@ -20,7 +20,7 @@ complementary_content: |
   project, and modify it as you wish; just please allow others to use your
   modifications and give credit to Sass, [Ubuntu][] and [Drupal][].
 
-  [ubuntu]: http://www.ubuntu.com/about/about-ubuntu/conduct
+  [ubuntu]: https://ubuntu.com/community/governance/code-of-conduct
   [drupal]: https://www.drupal.org/dcoc
   [cc]:     https://creativecommons.org/licenses/by-sa/3.0/us/
 
diff --git a/source/index.md b/source/index.md
index add347f..41631fb 100644
--- a/source/index.md
+++ b/source/index.md
@@ -31,8 +31,8 @@ eleventyComputed:
     - header: Frameworks
       body: >
         There are an endless number of frameworks built with Sass.
-        [Bootstrap](https://getbootstrap.com/), [Bourbon](http://bourbon.io/),
-        and [Susy](http://susy.oddbird.net/) just to name a few.
+        [Bootstrap](https://getbootstrap.com/), [Bourbon](https://www.bourbon.io/),
+        and [Susy](https://www.oddbird.net/susy/) just to name a few.
 ---
 
 <div class="sl-l-grid sl-l-grid--full sl-l-large-grid--fit sl-l-large-grid--center sl-l-large-grid--gutters-large">
diff --git a/source/install.md b/source/install.md
index db09eb3..7ffc758 100644
--- a/source/install.md
+++ b/source/install.md
@@ -17,10 +17,10 @@ most of the applications for free but a few of them are paid apps
 <small>(and totally worth it)</small>.
 
 - [CodeKit](https://codekitapp.com/) (Paid) Mac
-- [Hammer](http://hammerformac.com/) (Paid) Mac
+- [Hammer](https://hammerformac.com/) (Paid) Mac
 - [LiveReload](http://livereload.com/) (Paid, Open Source) Mac Windows
 - [Prepros](https://prepros.io/) (Paid) Mac Windows Linux
-- [Scout-App](http://scout-app.io/) (Free, Open Source) Windows Linux Mac
+- [Scout-App](https://scout-app.io/) (Free, Open Source) Windows Linux Mac
 
 ## Libraries
 
diff --git a/source/styleguide/brand.md b/source/styleguide/brand.md
index 51b927b..6bc2b41 100644
--- a/source/styleguide/brand.md
+++ b/source/styleguide/brand.md
@@ -21,9 +21,9 @@ title: Brand Guidelines
 
 <a href="/assets/img/styleguide/sass-logo.zip" class="sl-c-button sl-c-button--primary">Download vector logos</a>
 
-<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-sa/3.0/88x31.png" /></a>
+<a rel="license" href="https://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US"><img alt="Creative Commons License" style="border-width:0" src="https://licensebuttons.net/l/by-nc-sa/3.0/88x31.png" /></a>
 
-This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US">Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License</a>.
+This work is licensed under a <a rel="license" href="https://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_US">Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License</a>.
 
 ### Standard