diff --git a/app/Libraries/Mangboard/FileLibrary.php b/app/Libraries/Mangboard/FileLibrary.php
index a1d05eb..0ce09c3 100644
--- a/app/Libraries/Mangboard/FileLibrary.php
+++ b/app/Libraries/Mangboard/FileLibrary.php
@@ -76,7 +76,7 @@ class FileLibrary extends ParentLibrary
         if ($this->_boardLevel === null) {
             throw new \Exception("BoardModel Level이 지정되지 않았습니다.");
         }
-        return $this->_boardLevel;
+        return intval($this->_boardLevel);
     }
     public function setBoardLevel(string $boardLevel): void
     {