diff --git a/src/Documento.php b/src/Documento.php
index 3c0ad5a..5cd54e1 100644
--- a/src/Documento.php
+++ b/src/Documento.php
@@ -2,7 +2,7 @@
 
 namespace Bissolli\ValidadorCpfCnpj;
 
-class Documento
+class Documento extends DocumentoAbstract
 {
     /**
      * Value to be validated
@@ -11,21 +11,6 @@ class Documento
      */
     public $obj;
 
-    /**
-     * Create a new Documento instance
-     *
-     * @param string $value
-     */
-    public function __construct($value = null)
-    {
-        $value = (string) preg_replace('/[^0-9]/', '', $value);
-
-        if (strlen($value) === 11)
-            $this->obj = new CPF($value);
-        else
-            $this->obj = new CNPJ($value);
-    }
-
     /**
      * Get document type
      *
@@ -68,4 +53,21 @@ public function getValue()
     {
         return $this->obj->getValue();
     }
+
+    /**
+     * Set the clean value
+     *
+     * @return self
+     */
+    public function setValue($value)
+    {
+        $value = (string) preg_replace('/[^0-9]/', '', $value);
+
+        if (strlen($value) === 11)
+            $this->obj = new CPF($value);
+        else
+            $this->obj = new CNPJ($value);
+
+        return $this;
+    }
 }