diff --git a/src/SeaweedFS.php b/src/SeaweedFS.php
index 5fcf43b..bc9008c 100644
--- a/src/SeaweedFS.php
+++ b/src/SeaweedFS.php
@@ -131,7 +131,7 @@ public function upload($data, $filename = 'file.txt', $file = null) {
             throw new SeaweedFSException('File must contain a url and fid');
         }
 
-        $res = $this->client->post($this->buildVolumeUrl($file->publicUrl, $file->fid), [
+        $res = $this->client->post($this->buildVolumeUrl($file->url, $file->fid), [
             'multipart' => [
                 [
                     'name'     => 'file',