diff --git a/ansi.el b/ansi.el
index 644c1e5..f8ca738 100644
--- a/ansi.el
+++ b/ansi.el
@@ -1,13 +1,13 @@
-;;; ansi.el --- Turn string into ansi strings
+;;; ansi.el --- Turn string into ansi strings  -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 2010-2013 Johan Andersson
 
 ;; Author: Johan Andersson <johan.rejeep@gmail.com>
 ;; Maintainer: Johan Andersson <johan.rejeep@gmail.com>
 ;; Version: 0.4.1
-;; Keywords: color, ansi
+;; Keywords: terminals color  ansi
 ;; URL: http://github.com/rejeep/ansi
-;; Package-Requires: ((s "1.6.1") (dash "1.5.0"))
+;; Package-Requires: ((emacs "24.4") (s "1.6.1") (dash "1.5.0"))
 
 ;; This file is NOT part of GNU Emacs.
 
@@ -28,18 +28,19 @@
 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 ;; Boston, MA 02110-1301, USA.
 
+;;; Commentary:
+
+;; Turns simple strings to ansi strings.
+
+;; Turning a string into an ansi string can be to add color to a
+;; text, add color in the background of a text or adding a style,
+;; such as bold, underscore or italic.
+
 ;;; Code:
 
 (require 'dash)
 (require 's)
-
-(when (version<= "24.3" emacs-version)
-  (require 'cl-lib))
-
-;; Compatability alias for versions before cl-flet was introduced.
-(defalias 'ansi--cl-flet (if (version<= "24.3" emacs-version)
-                             'cl-flet
-                           'flet))
+(require 'cl-lib)
 
 
 
@@ -89,6 +90,7 @@
 
 
 (defun ansi--concat (&rest sequences)
+  "Concat string elements in SEQUENCES."
   (apply 's-concat (-select 'stringp sequences)))
 
 (defun ansi--code (effect)
@@ -110,8 +112,8 @@
        (apply 'ansi-apply (cons ',effect (cons format-string objects))))))
 
 (defmacro with-ansi (&rest body)
-  "In this block shortcut names (without ansi- prefix) can be used."
-  `(ansi--cl-flet
+  "Shortcut names (without ansi- prefix) can be used in this BODY."
+  `(cl-flet
        ,(-map
          (lambda (alias)
            (let ((fn (intern (format "ansi-%s" (symbol-name alias)))))
@@ -124,7 +126,8 @@
      ,(cons 'ansi--concat body)))
 
 (defun ansi-apply (effect-or-code format-string &rest objects)
-  "Apply EFFECT-OR-CODE to text."
+  "Apply EFFECT-OR-CODE to text.
+FORMAT-STRING and OBJECTS are processed same as `apply'."
   (let ((code (if (numberp effect-or-code)
                   effect-or-code
                 (ansi--code effect-or-code)))