diff --git a/GenshinUID/client.py b/GenshinUID/client.py
index 4ed70060..81571bbe 100644
--- a/GenshinUID/client.py
+++ b/GenshinUID/client.py
@@ -124,8 +124,8 @@ def to_json(msg: list, name: str, uin: str):
 
 
 def store_file(path: Path, file: str):
-    file_content = base64.b64decode(file).decode()
-    with open(path, 'w') as f:
+    file_content = base64.b64decode(file)
+    with open(path, 'wb') as f:
         f.write(file_content)