diff --git a/Gemfile b/Gemfile
index e4a50c3..c2565c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,4 +6,5 @@ gem 'textpow1x', '>=1.2'
 group :dev do
   gem 'rake', '0.8.7'
   gem 'rspec'
+  gem 'rack'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 973f318..c48a0b9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,6 +4,7 @@ GEM
     diff-lcs (1.1.3)
     oniguruma (1.1.0)
     plist (3.1.0)
+    rack (1.4.1)
     rake (0.8.7)
     rspec (2.6.0)
       rspec-core (~> 2.6.0)
@@ -21,6 +22,7 @@ PLATFORMS
 
 DEPENDENCIES
   oniguruma
+  rack
   rake (= 0.8.7)
   rspec
   textpow1x (>= 1.2)
diff --git a/Readme.md b/Readme.md
index b92ddba..e8c3d1f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -50,6 +50,14 @@ Ruby 1.8: [Install onigumura](https://github.com/grosser/textpow#ruby-18)
 
 # Maintainer info
 
+### Updating demo
+
+    cd _pages
+    bundle exec ruby generate.rb
+    bundle exec rackup
+
+    open http://localhost:9292
+
 ### Updating theme files
 
 Currently only XHTML is "officially" supported by ultraviolet, nevertheless,
diff --git a/_pages b/_pages
index d720706..0db24f4 160000
--- a/_pages
+++ b/_pages
@@ -1 +1 @@
-Subproject commit d720706c2a678e2bdd6f3ee2934070733e1907fa
+Subproject commit 0db24f48b10748752c032af7cdc9b123a522f023