diff --git a/notibox.el b/notibox.el
index 6baa069..945ab57 100644
--- a/notibox.el
+++ b/notibox.el
@@ -4,7 +4,7 @@
 
 ;; Author: mir <mirmarq428@gmail.com>
 ;; Keywords:frames,convenience,help
-;; Package-Requires: ((posframe) (alert))
+;; Package-Requires: ((posframe) (alert) (dash))
 
 ;; This file is NOT part of GNU Emacs.
 
@@ -31,6 +31,7 @@
 
 (require 'posframe)
 (require 'alert)
+(require 'dash)
 (if (not (fboundp #'string-pixel-width))
     (progn
       (require 'shr) ;for `shr-string-pixel-width'