diff --git a/src/nk/DocumentBundle/Entity/Document.php b/src/nk/DocumentBundle/Entity/Document.php
index 3e38f31..c150f83 100644
--- a/src/nk/DocumentBundle/Entity/Document.php
+++ b/src/nk/DocumentBundle/Entity/Document.php
@@ -60,9 +60,8 @@ class Document
     /**
      * @var string
      *
-     * @ORM\Column(name="unit", type="string", length=10)
+     * @ORM\Column(name="unit", type="string", length=30)
      * @Assert\NotBlank()
-     * @Assert\Regex("/^[A-Z]{2,4}-[0-9]{4}$|^[A-Z]{2}[0-9]{1}[A-Z]{1}[0-9]{2}$|^[A-Z]{2}-[0-9]{4}$/")
      * @Serializer\Groups({"list", "details"})
      */
     private $unit;