diff --git a/Gemfile b/Gemfile
index bb32ba7..d162e73 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'nanoc'
 
 gem 'haml'
-gem 'kramdown'
+gem 'rdiscount'
 
 gem 'pygments.rb'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 4010b80..d2c79fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,12 +3,12 @@ GEM
   specs:
     adsf (1.1.1)
       rack (>= 1.0.0)
-    builder (3.2.0)
-    chunky_png (1.2.7)
+    builder (3.2.2)
+    chunky_png (1.2.8)
     coffee-script (2.2.0)
       coffee-script-source
       execjs
-    coffee-script-source (1.6.2)
+    coffee-script-source (1.6.3)
     colored (1.2)
     compass (0.12.2)
       chunky_png (~> 1.2)
@@ -19,33 +19,35 @@ GEM
     execjs (1.4.0)
       multi_json (~> 1.0)
     fssm (0.2.10)
-    haml (4.0.1)
+    haml (4.0.3)
       tilt
     i18n (0.6.4)
-    json (1.7.7)
-    kramdown (0.14.2)
-    mime-types (1.21)
-    multi_json (1.7.1)
-    nanoc (3.6.1)
+    json (1.8.0)
+    mime-types (1.23)
+    mini_portile (0.5.1)
+    multi_json (1.7.7)
+    nanoc (3.6.4)
       cri (~> 2.3)
     nanoc-cachebuster (0.3.1)
       nanoc (>= 3.3.0)
     nanoc-javascript-concatenator (0.0.2)
       nanoc (>= 3.3.0)
-    nokogiri (1.5.9)
+    nokogiri (1.6.0)
+      mini_portile (~> 0.5.0)
     posix-spawn (0.3.6)
-    pygments.rb (0.4.2)
+    pygments.rb (0.5.2)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
     rack (1.5.2)
-    rake (10.0.3)
+    rake (10.1.0)
+    rdiscount (2.1.6)
     rubypants (0.2.0)
-    sass (3.2.7)
+    sass (3.2.9)
     systemu (2.5.2)
-    tilt (1.3.6)
+    tilt (1.4.1)
     typogruby (1.0.15)
       rubypants
-    uglifier (1.3.0)
+    uglifier (2.1.2)
       execjs (>= 0.3.0)
       multi_json (~> 1.0, >= 1.0.2)
     w3c_validators (1.2)
@@ -63,7 +65,6 @@ DEPENDENCIES
   compass
   haml
   i18n
-  kramdown
   mime-types
   multi_json (~> 1.3)
   nanoc
@@ -73,6 +74,7 @@ DEPENDENCIES
   pygments.rb
   rack
   rake
+  rdiscount
   sass
   systemu
   typogruby
diff --git a/Rules b/Rules
index f0fe75b..6ef1a5e 100644
--- a/Rules
+++ b/Rules
@@ -1,9 +1,19 @@
 #!/usr/bin/env ruby
 
+puts "=" * 76
+if ENV['NANOC_ENV'] == "production"
+  puts "  > Running in PRODUCTION mode"
+else
+  puts "  > Running in DEVELOPMENT mode"
+end
+puts "=" * 76
+
 preprocess do
-  create_robots_txt
-  create_webmaster_tools_authentications
-  create_sitemap
+  if ENV['NANOC_ENV'] == "production"
+    create_robots_txt
+    create_webmaster_tools_authentications
+    create_sitemap
+  end
 end
 
 compile %r{^/(google|robots|assets)} do
@@ -20,7 +30,10 @@ end
 
 compile '/sitemap/', :rep => 'gzip' do
   filter :erb
-  filter :shellcmd, :cmd => 'gzip'
+
+  if ENV['NANOC_ENV'] == "production"
+    filter :shellcmd, :cmd => 'gzip'
+  end
 end
 
 # Use screen.scss as the single entry point for styles, ignore everything else in /assets/css
@@ -33,7 +46,11 @@ compile '/css/*' do
 end
 
 route '/css/screen/' do
-  fp = fingerprint(item[:filename])
+  if ENV['NANOC_ENV'] == "production"
+    fp = fingerprint(item[:filename])
+  else
+    fp = ''
+  end
   item.identifier.chop + fp + '.css'
 end
 
@@ -41,7 +58,10 @@ compile '/js/*/' do
   filter :coffeescript if @item[:extension] == 'coffee'
 
   filter :concat_js
-  filter :uglify_js
+
+  if ENV['NANOC_ENV'] == "production"
+    filter :uglify_js
+  end
 end
 
 route '/js/*/' do
@@ -54,20 +74,29 @@ compile '/rss/' do
 end
 
 compile '/posts/*' do
-  filter :kramdown
+  filter :rdiscount
   filter :pygmentizer
-  filter :typogruby
+
+  if ENV['NANOC_ENV'] == "production"
+    filter :typogruby
+  end
+
   layout 'post'
   layout 'default'
 
-  filter :cache_buster
+  if ENV['NANOC_ENV'] == "production"
+    filter :cache_buster
+  end
 end
 
 compile %r{^/(404)/$} do
   filter :haml, format: :html5, ugly: true
 
   layout 'default'
-  filter :cache_buster
+  
+  if ENV['NANOC_ENV'] == "production"
+    filter :cache_buster
+  end
 end
 
 compile '*' do
@@ -85,7 +114,10 @@ compile '*' do
     if %w(html haml md).include?(item[:extension])
       layout 'page'
       layout 'default'
-      filter :cache_buster
+
+      if ENV['NANOC_ENV'] == "production"
+        filter :cache_buster
+      end
     end
   end
 end
@@ -99,7 +131,12 @@ route %r{^/(assets/.*|sitemap|robots|atom)/$} do
   ext = 'js' if ext == 'coffee'
   ext = 'css' if ext == 'scss'
 
-  fp = cachebust?(item) ? fingerprint(item[:filename]) : ''
+  if ENV['NANOC_ENV'] == "production"
+    fp = cachebust?(item) ? fingerprint(item[:filename]) : ''
+  else
+    fp = ''
+  end
+
   item.identifier.chop + fp + '.' + ext
 end