diff --git a/youtube_up/__main__.py b/youtube_up/__main__.py
index 4b6a546..bd4d933 100644
--- a/youtube_up/__main__.py
+++ b/youtube_up/__main__.py
@@ -176,6 +176,7 @@ def callback(step: str, prog: int):
         args_dict.pop("cookies_file")
         args_dict.pop("command")
         video_file = args_dict.pop("filename")
+        args_dict["captions_files"] = [args_dict.pop("captions_file")]
         metadata = Metadata.from_dict(args_dict)
         with tqdm.tqdm(total=100) as pbar:
 
@@ -187,4 +188,4 @@ def callback(step: str, prog: int):
 
 
 if __name__ == "__main__":
-    main()
+    main()
\ No newline at end of file
diff --git a/youtube_up/metadata.py b/youtube_up/metadata.py
index 9f92833..c2bb1e0 100644
--- a/youtube_up/metadata.py
+++ b/youtube_up/metadata.py
@@ -385,7 +385,7 @@ class Metadata:
     description: str = ""
     """Description. Max length 5000"""
 
-    privacy: PrivacyEnum = PrivacyEnum.PRIVATE
+    privacy: Optional[PrivacyEnum] = PrivacyEnum.PRIVATE
     """Privacy. Possible values: PUBLIC, UNLISTED, PRIVATE"""
 
     made_for_kids: bool = False