diff --git a/_config.yml b/_config.yml
index 022ee4d..c5a4e84 100644
--- a/_config.yml
+++ b/_config.yml
@@ -3,10 +3,10 @@
 permalink: /:categories/:year/:title 
 
 exclude: [".rvmrc", ".rbenv-version", "README.md", "Rakefile", "changelog.md"]
-pygments: true  
+highlighter: pygments
 port: 8888
 
-markdown: rdiscount
+markdown: kramdown
 
 # Themes are encouraged to use these universal variables 
 # so be sure to set them if your theme uses them.
diff --git a/atom.xml b/atom.xml
index 97f6d6b..13d4eae 100644
--- a/atom.xml
+++ b/atom.xml
@@ -1,5 +1,5 @@
 ---
-layout: nil
+layout: null
 title : Atom Feed
 ---
 <?xml version="1.0" encoding="utf-8"?>
diff --git a/rss.xml b/rss.xml
index 106b649..cb0e9b9 100644
--- a/rss.xml
+++ b/rss.xml
@@ -1,5 +1,5 @@
 ---
-layout: nil
+layout: null
 title : RSS Feed
 ---