diff --git a/README.md b/README.md
index 7695360a..b19d022b 100644
--- a/README.md
+++ b/README.md
@@ -9,10 +9,10 @@ You can input a variety of commands into LearnGitBranching (LGB) -- as commands
 ![demo-gif](https://user-images.githubusercontent.com/7308241/39848730-040bd09e-53df-11e8-964e-2d48f35a4355.gif)
 
 This visualization combined with tutorials and "levels" can help both beginners and intermediate developers polish their version control skills. A quick demo is available here:
-http://pcottle.github.com/learnGitBranching/?demo
+https://pcottle.github.com/learnGitBranching/?demo
 
 Or you can launch the application normally here:
-http://pcottle.github.com/learnGitBranching/
+https://pcottle.github.com/learnGitBranching/
 
 ### Sandbox Mode
 
@@ -37,7 +37,7 @@ You can share a link to LearnGitBranching with an arbitrary set of commands that
 ### Level Builder
 
 You can build levels with `build level`. The dialog will walk you through the process, and at the end you can `export level` to get a JSON blob. Paste that in a gist or directly into an issue and I can check it out / merge in your changes! You can also share this level directly with friends by having them run "import level" or simply specify a gist ID in the url params like so:
-http://pcottle.github.io/learnGitBranching/?gist_level_id=a84407351f9c9f0cb241
+https://pcottle.github.io/learnGitBranching/?gist_level_id=a84407351f9c9f0cb241
 
 ## Reporting Bugs / Opening Issues
 
@@ -71,7 +71,7 @@ Thus, if you build the app locally, all you have to do in order to run the app i
 For contributing core functionality in the app, you'll probably want to test your changes
 at least once before submitting a pull request. That means you'll need the "Grunt.js" build tool to build the app:
 
-http://gruntjs.com/getting-started
+https://gruntjs.com/getting-started
 
 You'll also need `npm` to download all the dependencies of the project.
 
diff --git a/src/js/dialogs/sandbox.js b/src/js/dialogs/sandbox.js
index 8ca35b90..bb088acc 100644
--- a/src/js/dialogs/sandbox.js
+++ b/src/js/dialogs/sandbox.js
@@ -18,7 +18,7 @@ exports.dialog = {
         '',
         'PS: Want to go straight to a sandbox next time?',
         'Try out ',
-        '[this special link](http://pcottle.github.io/learnGitBranching/?NODEMO)'
+        '[this special link](https://pcottle.github.io/learnGitBranching/?NODEMO)'
       ]
     }
   }],
@@ -37,11 +37,11 @@ exports.dialog = {
         '',
         'Si no viste la demo, mirala en esta dirección:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo)',
         '',
         '¿Harto de este mensaje? Agregale `?NODEMO` a la URL para dejar de verlo, como en este link:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
       ]
     }
   }, {
@@ -93,11 +93,11 @@ exports.dialog = {
         '',
         'Se você ainda não viu o demo, veja aqui:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo)',
         '',
         'Farto desta mensagem? Acrescente `?NODEMO` ao endereço para se livrar dela, como no link abaixo:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
       ]
     }
   }, {
@@ -146,11 +146,11 @@ exports.dialog = {
         '',
         'Falls du die Demonstration noch nicht gesehen hast, schau sie dir hier an:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo)',
         '',
         'Genervt von diesem Fenster? Häng `?NODEMO` an die URL um es los zu werden, so wie hier:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
       ]
     }
   }, {
@@ -202,11 +202,11 @@ exports.dialog = {
         '',
         '簡単なデモを用意してあるので、もしよければこちらもご覧ください：',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo&locale=ja)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo&locale=ja)',
         '',
         'このダイアログ自体を省略するには、以下のようにURLの末尾にクエリストリング`?NODEMO`を付加してアクセスしてください。',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](http://pcottle.github.io/learnGitBranching/?NODEMO&locale=ja)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](https://pcottle.github.io/learnGitBranching/?NODEMO&locale=ja)'
       ]
     }
   }, {
@@ -243,7 +243,7 @@ exports.dialog = {
         '',
         'それでは教材の選択画面に進んでみることにします。',
         '',
-        '（なお、日本語版製作者のフォークサイトは[こちら](http://remore.github.io/learnGitBranching-ja/)になります。）'
+        '（なお、日本語版製作者のフォークサイトは[こちら](https://remore.github.io/learnGitBranching-ja/)になります。）'
       ]
     }
   }],
@@ -281,11 +281,11 @@ exports.dialog = {
         '',
         '如果你還沒看過演示，請到此查看：',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo)',
         '',
         '厭煩這個對話視窗嗎？在 URL 後頭加上 `?NODEMO` 就看不到它了，也可以直接點下邊這個連結：',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](http://pcottle.github.io/learnGitBranching/?NODEMO)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](https://pcottle.github.io/learnGitBranching/?NODEMO)'
       ]
     }
   }, {
@@ -330,10 +330,10 @@ exports.dialog = {
         '탄탄히 잡게끔 도와드리기 위해 만들었습니다. 재밌게 사용해주시기를',
         '바라며, 무언가를 배워가신다면 더 기쁘겠습니다!',
         '',
-        '이 애플리케이션은 [Peter Cottle](https://github.io/pcottle)님의 [LearnGitBranching](http://pcottle.github.io/learnGitBranching/)를 번역한 것입니다.',
+        '이 애플리케이션은 [Peter Cottle](https://github.io/pcottle)님의 [LearnGitBranching](https://pcottle.github.io/learnGitBranching/)를 번역한 것입니다.',
         '아래 데모를 먼저 보셔도 좋습니다.',
         '',
-        '<http://pcottle.github.io/learnGitBranching/?demo&locale=ko>'
+        '<https://pcottle.github.io/learnGitBranching/?demo&locale=ko>'
       ]
     }
   }, {
@@ -383,11 +383,11 @@ exports.dialog = {
         '',
         'Si vous n\'avez pas vu la démo, vous pouvez le faire là :',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo)',
         '',
         'Agacé par ce dialogue ? Ajoutez `?NODEMO` à l\'URL pour le supprimer, en lien ci-dessous pour votre commodité :',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
       ]
     }
   }, {
@@ -439,11 +439,11 @@ exports.dialog = {
         '',
         'Если ты не видел демонстрацию – посмотри её тут:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?demo](http://pcottle.github.io/learnGitBranching/?demo)',
+        '[https://pcottle.github.io/learnGitBranching/?demo](https://pcottle.github.io/learnGitBranching/?demo)',
         '',
         'Достало это сообщение? Добавь `?NODEMO` к адресу и навсегда забудь о нём, ниже ссылка для удобства:',
         '',
-        '[http://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
+        '[https://pcottle.github.io/learnGitBranching/?NODEMO](?NODEMO)'
       ]
     }
   }, {
@@ -498,7 +498,7 @@ exports.dialog = {
         '',
         'P.S. Хочеш перейти одразу до пісочниці наступного разу?',
         'Спробуй ',
-        '[це спеціальне посилання.](http://pcottle.github.io/learnGitBranching/?NODEMO)'
+        '[це спеціальне посилання.](https://pcottle.github.io/learnGitBranching/?NODEMO)'
       ]
     }
   }]
diff --git a/src/template.index.html b/src/template.index.html
index 105e97d5..c5312f4f 100644
--- a/src/template.index.html
+++ b/src/template.index.html
@@ -9,8 +9,8 @@
 
   <meta property="og:title" content="Learn Git Branching"/>
   <meta property="og:type" content="website"/>
-  <meta property="og:url" content="http://pcottle.github.io/learnGitBranching/index.html?demo"/>
-  <meta property="og:image" content="http://pcottle.github.io/learnGitBranching/assets/learnGitBranching.png"/>
+  <meta property="og:url" content="https://pcottle.github.io/learnGitBranching/index.html?demo"/>
+  <meta property="og:image" content="https://pcottle.github.io/learnGitBranching/assets/learnGitBranching.png"/>
   <meta property="og:description" content="An interactive Git visualization tool to educate and challenge!"/>
 
   <link rel="stylesheet" href="build/{{styleFile}}" type="text/css" charset="utf-8">