diff --git a/_config.yml b/_config.yml
index b30d4e5b6e..ca6735049a 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,14 +1,14 @@
-# This is the default format. 
+# This is the default format.
 # For more see: http://jekyllrb.com/docs/permalinks/
-permalink: /:categories/:year/:month/:day/:title 
+permalink: /:categories/:year/:month/:day/:title
 
 exclude: [".rvmrc", ".rbenv-version", "README.md", "Rakefile", "changelog.md"]
-pygments: true
+highlighter: pygments
 
 # https://help.github.com/articles/migrating-your-pages-site-from-maruku
 markdown: kramdown
 
-# Themes are encouraged to use these universal variables 
+# Themes are encouraged to use these universal variables
 # so be sure to set them if your theme uses them.
 #
 title : Jekyll Bootstrap-3
@@ -21,7 +21,7 @@ author :
   feedburner : feedname
 
 # The production_url is only used when full-domain names are needed
-# such as sitemap.txt 
+# such as sitemap.txt
 # Most places will/should use BASE_PATH to make the urls
 #
 # If you have set a CNAME (pages.github.com) set your custom domain here.
@@ -40,11 +40,11 @@ JB :
   # however this value will be dynamically changed depending on your deployment situation.
   #
   # CNAME (http://yourcustomdomain.com)
-  #   DO NOT SET BASE_PATH 
+  #   DO NOT SET BASE_PATH
   #   (urls will be prefixed with "/" and work relatively)
   #
   # GitHub Pages (http://username.github.io)
-  #   DO NOT SET BASE_PATH 
+  #   DO NOT SET BASE_PATH
   #   (urls will be prefixed with "/" and work relatively)
   #
   # GitHub Project Pages (http://username.github.io/project-name)
@@ -63,7 +63,7 @@ JB :
   # ex: [BASE_PATH]/assets/themes/[THEME-NAME]
   #
   # Override this by defining an absolute path to assets here.
-  # ex: 
+  # ex:
   #   http://s3.amazonaws.com/yoursite/themes/watermelon
   #   /assets
   #
@@ -95,14 +95,14 @@ JB :
       num_posts: 5
       width: 580
       colorscheme: light
-   
+
   # Settings for analytics helper
   # Set 'provider' to the analytics provider you want to use.
   # Set 'provider' to false to turn analytics off globally.
-  #        
+  #
   analytics :
-    provider : google 
-    google : 
+    provider : google
+    google :
         tracking_id : 'UA-***'
     googleUA :
         tracking_id : 'UA-***'
@@ -115,19 +115,19 @@ JB :
         baseURL : 'myserver.tld/piwik' # Piwik installation address (without protocol)
         idsite : '1'                   # the id of the site on Piwik
 
-  # Settings for sharing helper. 
+  # Settings for sharing helper.
   # Sharing is for things like tweet, plusone, like, reddit buttons etc.
   # Set 'provider' to the sharing provider you want to use.
   # Set 'provider' to false to turn sharing off globally.
   #
   sharing :
     provider : false
-    
-  # Settings for all other include helpers can be defined by creating 
+
+  # Settings for all other include helpers can be defined by creating
   # a hash with key named for the given helper. ex:
   #
   #   pages_list :
-  #     provider : "custom"   
+  #     provider : "custom"
   #
   # Setting any helper's provider to 'custom' will bypass the helper code
   # and include your custom code. Your custom file must be defined at: