diff --git a/src/Source.php b/src/Source.php
index caba155..4bf01fa 100644
--- a/src/Source.php
+++ b/src/Source.php
@@ -10,6 +10,9 @@ use ProVM\Common\Alias\Model;
  * @property \DateInterval $frecuency
  */
 class Source extends Model {
+  public static $_table = 'sources';
+  public static $_id_column = ['currency_id', 'url'];
+
   protected $currency;
   public function currency(): ?Currency {
     if ($this->currency === null) {