diff --git a/metagpt/utils/file.py b/metagpt/utils/file.py
index 50cc69cc7..39ff74c32 100644
--- a/metagpt/utils/file.py
+++ b/metagpt/utils/file.py
@@ -66,7 +66,7 @@ class File:
         try:
             chunk_size = chunk_size or cls.CHUNK_SIZE
             async with aiofiles.open(file_path, mode="rb") as reader:
-                chunks = []
+                chunks = list()
                 while True:
                     chunk = await reader.read(chunk_size)
                     if not chunk: