diff --git a/readme.md b/readme.md
index 21ed5ac..4d5135a 100644
--- a/readme.md
+++ b/readme.md
@@ -6,6 +6,9 @@ Are you tired from casting objects and array to each other? Ary is a light class
 2. You will get `null` if an index does not exists. 
 3. You can specify a default value for a missing index. 
 
+* The class (`Ary()`) requires PHP 5.4 or newer.
+* The helper function (`ary()`) requires PHP 5.6 or newer. 
+
 ~~~~~
 // instantiation
 $ary = new Ary();
@@ -27,4 +30,4 @@ $ary->newItem=20; //or
 $ary['newItem']=20;
 
 count($ary); //returns 3
-$ary->all(); // returns simple php array;
\ No newline at end of file
+$ary->all(); // returns simple php array;
diff --git a/src/Ary.php b/src/Ary.php
index 0cadce0..90ca06b 100644
--- a/src/Ary.php
+++ b/src/Ary.php
@@ -1,8 +1,8 @@
 <?php
 /**
- * Created by PhpStorm.
+ * Created Reza Salarmehr.
  *
- * Inspired by Laravel Collection and Arr class.
+ * Some methods are from Laravel source code.
  *
  * Date: 18/09/2015
  * Time: 22:37