diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index dfc4c84..c4164af 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -7,4 +7,4 @@ fair place to play.
 
 [The full community guidelines can be found on the Sass website.][link]
 
-[link]: http://sass-lang.com/community-guidelines
+[link]: https://sass-lang.com/community-guidelines
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bbc0eb5..545d28a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,7 +1,7 @@
 Contributing to the Sass website
 ================================
 
-**Please read the [Implementation Guide](http://sass-lang.com/implementation)**
+**Please read the [Implementation Guide](https://sass-lang.com/implementation)**
 The Sass website is open source. See a bug or typo? Have an idea? Just do the
 following:
 
diff --git a/Gemfile b/Gemfile
index 6ddb5e0..42f625c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,6 +16,7 @@ gem 'puma'
 gem 'rack'
 gem 'rack-contrib'
 gem 'rack-rewrite'
+gem 'rack-ssl',               '~> 1.4'
 gem 'rake'
 gem 'redcarpet',              '~> 3.3.3'
 gem 'semantic',               '~> 1.6'
diff --git a/Gemfile.lock b/Gemfile.lock
index b92a78a..2bca85e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -140,6 +140,8 @@ GEM
     rack-livereload (0.3.16)
       rack
     rack-rewrite (1.5.1)
+    rack-ssl (1.4.1)
+      rack
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rake (12.3.0)
@@ -207,6 +209,7 @@ DEPENDENCIES
   rack
   rack-contrib
   rack-rewrite
+  rack-ssl (~> 1.4)
   rake
   redcarpet (~> 3.3.3)
   semantic (~> 1.6)
@@ -221,4 +224,4 @@ RUBY VERSION
    ruby 2.4.1p111
 
 BUNDLED WITH
-   1.16.2
+   1.16.6
diff --git a/README.md b/README.md
index 28117bd..76fd54e 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,5 @@
 The Sass website is open source. See a typo? Have a UX improvement? Check out
 the [Contributing guide](https://github.com/sass/sass-site/blob/master/CONTRIBUTING.md)!
 
-* [Sass website Style Guide](http://sass-lang.com/styleguide)
+* [Sass website Style Guide](https://sass-lang.com/styleguide)
 * [@TeamSassDesign](http://twitter.com/teamsassdesign)
diff --git a/config.ru b/config.ru
index 3d9b3c1..953ced0 100644
--- a/config.ru
+++ b/config.ru
@@ -1,9 +1,12 @@
 require "rubygems"
 
 require "rack/rewrite"
+require "rack/ssl"
 require "rack/contrib/not_found"
 require "rack/contrib/try_static"
 
+use Rack::SSL if ENV["HEROKU"] == 'true'
+
 use Rack::Rewrite do
   r301 %r{/docs/yardoc/(.*)}, '/documentation/$1'
   r301 '/tutorial.html', '/guide'
diff --git a/data/sitemap.yml b/data/sitemap.yml
index 265f761..c235837 100644
--- a/data/sitemap.yml
+++ b/data/sitemap.yml
@@ -1 +1 @@
-url: http://sass-lang.com
+url: https://sass-lang.com
diff --git a/source/layouts/regions/_contentinfo.haml b/source/layouts/regions/_contentinfo.haml
index ae0d420..e9507b5 100644
--- a/source/layouts/regions/_contentinfo.haml
+++ b/source/layouts/regions/_contentinfo.haml
@@ -11,7 +11,7 @@
             and&nbsp;numerous&nbsp;contributors.
 
             It is available for use and modification under the
-            [MIT&nbsp;License](http://sass-lang.com/docs/yardoc/file.MIT-LICENSE.html).
+            [MIT&nbsp;License](https://github.com/sass/dart-sass/blob/master/LICENSE).
 
         %li.contentinfo-tools
           %ul