diff --git a/Classes/Domain/Model/AssetAttribute.php b/Classes/Domain/Model/AssetAttribute.php
index 395941e..d6a0328 100644
--- a/Classes/Domain/Model/AssetAttribute.php
+++ b/Classes/Domain/Model/AssetAttribute.php
@@ -62,7 +62,7 @@ class AssetAttribute
             $this->value = $value;
         }
         if (!$urlValue) {
-            $urlValue = $this->value;
+            $urlValue = \mb_substr($this->value, 0, 250);
         }
         $this->urlValue = $urlValue;
     }