diff --git a/app/Classes/Modules/Documents/DataTransferObjects/FileObject.php b/app/Classes/Modules/Documents/DataTransferObjects/FileObject.php
index 9e2b5cf5..232fe55d 100644
--- a/app/Classes/Modules/Documents/DataTransferObjects/FileObject.php
+++ b/app/Classes/Modules/Documents/DataTransferObjects/FileObject.php
@@ -66,7 +66,7 @@ class FileObject implements DataTransferObject
      */
     public function getDecodedData(): string
     {
-        return $this->getExtension() === 'pdf' ?
+        return in_array($this->getExtension(), ['pdf', 'excel']) ?
             base64_decode((explode('base64,', $this->getData()))[1]):
             $this->getData()->encode('data-url')->encoded;
     }