diff --git a/Rakefile b/Rakefile
index 073b989a..832efd86 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,4 @@
+require 'rake/clean'
 require 'rake/testtask'
 
 task :default => :test
@@ -5,3 +6,9 @@ task :default => :test
 Rake::TestTask.new do |t|
   t.warning = true
 end
+
+CLOBBER.include 'lib/linguist/lexers.yml'
+
+file 'lib/linguist/lexers.yml' do |f|
+  sh "./bin/pygments-lexers > #{f.name}"
+end