diff --git a/src/Client.php b/src/Client.php
index aa9e542..f0dfa42 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -146,10 +146,11 @@ public function runRawQuery(string $queryString, $resultsAsArray = false, array
             $map = [];
 
             foreach ($files as $key => $file) {
-                $map[$key] = ["variables.${key}"];
+                $index = (string) count($map);
+                $map[$index] = ["variables.${key}"];
 
-                $formatted_files[] = [
-                    'name' => $key,
+                $formatted_files[$index] = [
+                    'name' => $index,
                     'contents' => $file->contents,
                     'filename' => $file->filename,
                 ];