diff --git a/rubocopfmt.el b/rubocopfmt.el
index 4f2a76f..e12f9e0 100644
--- a/rubocopfmt.el
+++ b/rubocopfmt.el
@@ -2,6 +2,7 @@
 
 ;; Version: 0.2.0
 ;; Keywords: convenience wp edit ruby rubocop
+;; Package-Requires: ((cl-lib "0.5"))
 ;; URL: https://github.com/jimeh/rubocopfmt.el
 ;; Author: Jim Myhrberg