diff --git a/_docs/README.md b/_docs/README.md
index 2c16aad13..c3f247a7c 100644
--- a/_docs/README.md
+++ b/_docs/README.md
@@ -5,3 +5,7 @@
 # How to run HTTP server
 
 `go run server.go`
+
+# How to deploy
+
+git subtree push --prefix _docs/public/ origin gh-pages
diff --git a/_docs/examplecontent.tmpl.html b/_docs/examplecontent.tmpl.html
index 71a9e1e73..d514e0a9d 100644
--- a/_docs/examplecontent.tmpl.html
+++ b/_docs/examplecontent.tmpl.html
@@ -17,7 +17,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = '{{.Example.Name}}.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/{{.CurrentBranch}}/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/{{.CurrentBranch}}/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/blocks.content.html b/_docs/public/examples/blocks.content.html
index 96e9f058d..90c2a694b 100644
--- a/_docs/public/examples/blocks.content.html
+++ b/_docs/public/examples/blocks.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'blocks.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/hue.content.html b/_docs/public/examples/hue.content.html
index c8ab3a062..e6acad9cb 100644
--- a/_docs/public/examples/hue.content.html
+++ b/_docs/public/examples/hue.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'hue.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/keyboard.content.html b/_docs/public/examples/keyboard.content.html
index 229bc0b41..cf5d2dce2 100644
--- a/_docs/public/examples/keyboard.content.html
+++ b/_docs/public/examples/keyboard.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'keyboard.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/mosaic.content.html b/_docs/public/examples/mosaic.content.html
index 2cb010264..39705cc37 100644
--- a/_docs/public/examples/mosaic.content.html
+++ b/_docs/public/examples/mosaic.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'mosaic.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/paint.content.html b/_docs/public/examples/paint.content.html
index d049aac52..cd12b636e 100644
--- a/_docs/public/examples/paint.content.html
+++ b/_docs/public/examples/paint.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'paint.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/perspective.content.html b/_docs/public/examples/perspective.content.html
index b883bd0e8..2a16cf54f 100644
--- a/_docs/public/examples/perspective.content.html
+++ b/_docs/public/examples/perspective.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'perspective.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/piano.content.html b/_docs/public/examples/piano.content.html
index a8933e09c..1e7d154d8 100644
--- a/_docs/public/examples/piano.content.html
+++ b/_docs/public/examples/piano.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'piano.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);
diff --git a/_docs/public/examples/rotate.content.html b/_docs/public/examples/rotate.content.html
index 142eec35c..b0f61be7e 100644
--- a/_docs/public/examples/rotate.content.html
+++ b/_docs/public/examples/rotate.content.html
@@ -31,7 +31,7 @@ window.addEventListener('load', function() {
   var s = document.createElement('script');
   var src = 'rotate.js';
   if (isProduction()) {
-    src = 'http://hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
+    src = '//hajimehoshi.github.io/ebiten.pagestorage/master/' + src;
   }
   s.src = src;
   document.body.appendChild(s);