diff --git a/lib/bcu.rb b/lib/bcu.rb
index e348002..84cf604 100644
--- a/lib/bcu.rb
+++ b/lib/bcu.rb
@@ -14,7 +14,6 @@
 require "extend/cask"
 require "extend/version"
 require "fileutils"
-require "set"
 require "shellwords"
 
 module Bcu