diff --git a/Rakefile b/Rakefile
index d6af647..6a952e1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,6 @@
 require 'middleman-gh-pages'
+require 'rake/clean'
+
+CLOBBER.include('build')
 
 task :default => [:build]