diff --git a/Rakefile b/Rakefile
index c345185..826e548 100644
--- a/Rakefile
+++ b/Rakefile
@@ -411,30 +411,37 @@ end
 
 desc "Update configurations to support publishing to root or sub directory"
 task :set_root_dir, :dir do |t, args|
-  if args.dir
-    dir = args.dir
-  else
-    dir = get_stdin("Please provide a directory: ")
+  path = args.dir || nil
+  if path.nil?
+    path = get_stdin("Please provide a directory: ")
   end
-  if dir
-    if dir == "/"
-      dir = ""
+  if path
+    if path == "/"
+      path = ""
     else
-      dir = "/" + args.dir.sub(/(\/*)(.+)/, "\\2").sub(/\/$/, '');
+      path = "/" + path.sub(/(\/*)(.+)/, "\\2").sub(/\/$/, '');
     end
     # update personal configuration
-    site_configs = configurator.read_configuration('site.yml')
-    site_configs[:destination] = "public#{dir}"
-    site_configs[:subscribe_rss] = "#{dir}/atom.xml"
-    site_configs[:root] = "/#{dir.sub(/^\//, '')}"
+    site_configs = configurator.read_config('site.yml')
+    site_configs[:destination] = "public#{path}"
+    root = "/#{path.sub(/^\//, '')}"
+    url = $1 if site_configs[:url] =~ /(https?:\/\/[^\/]+)/i 
+    site_configs[:url] = url + path
+    site_configs[:subscribe_rss] = "#{path}/atom.xml"
+    site_configs[:root] = "#{root}"
     configurator.write_config('site.yml', site_configs)
 
     rm_rf configuration[:destination]
     mkdir_p site_configs[:destination]
-    puts "\n========================================================"
-    puts "Site's root directory is now '/#{dir.sub(/^\//, '')}'"
-    puts "Don't forget to update your url in _config.yml"
-    puts "\n========================================================"
+    puts "\nYour _config/site.yml has been updated to the following"
+    output = <<-EOF
+
+  url: #{url + path}
+  destination: public#{path}
+  subscribe_rss: #{path}/atom.xml
+  root: #{root}
+EOF
+    puts output.yellow
   end
 end