diff --git a/installer/data-downloader/backend/storage.py b/installer/data-downloader/backend/storage.py
index 7c18feb..018a80d 100644
--- a/installer/data-downloader/backend/storage.py
+++ b/installer/data-downloader/backend/storage.py
@@ -37,7 +37,9 @@ def _write_file(self, payload: dict) -> None:
         with NamedTemporaryFile("w", delete=False, dir=str(self.path.parent), encoding="utf-8") as tmp:
             json.dump(payload, tmp, indent=2, ensure_ascii=True)
             tmp.flush()
-        Path(tmp.name).replace(self.path)
+        tmp_path = Path(tmp.name)
+        tmp_path.chmod(0o664)
+        tmp_path.replace(self.path)
 
 
 class RunsRepository: