diff --git a/lib/xcode-build-times.rb b/lib/xcode-build-times.rb
index caa05d7..89d59b8 100755
--- a/lib/xcode-build-times.rb
+++ b/lib/xcode-build-times.rb
@@ -1,6 +1,7 @@
 #!/usr/bin/ruby
 #encoding: utf-8
 require 'xcodeproj'
+require 'fileutils'
 require_relative 'stringcolors'
 require 'fileutils'