diff --git a/app/Traits/WithArticleAttributes.php b/app/Traits/WithArticleAttributes.php
index bffe59b8..29c262ea 100644
--- a/app/Traits/WithArticleAttributes.php
+++ b/app/Traits/WithArticleAttributes.php
@@ -27,7 +27,7 @@ trait WithArticleAttributes
 
     public int $reading_time = 1;
 
-    public mixed $file;
+    public $file;
 
     /**
      * @var array|string[]