diff --git a/src/RemoveBg.php b/src/RemoveBg.php
index 3e48fb7..68f0ae7 100644
--- a/src/RemoveBg.php
+++ b/src/RemoveBg.php
@@ -203,6 +203,7 @@ protected function formatBody()
         switch ($this->imageFormat) {
             case 'image_file':
                 $index = 0;
+                $data = [];
                 foreach ($this->body as $key => $value) {
                     $data[$index]['name'] = $key;
                     $data[$index]['contents'] = $value;