diff --git a/swcc/swcc/__init__.py b/swcc/swcc/__init__.py
index 167d25d0..e3b136fa 100644
--- a/swcc/swcc/__init__.py
+++ b/swcc/swcc/__init__.py
@@ -133,7 +133,7 @@ def cli(ctx, url, json_output: bool, verbose: int):
     ctx.obj = CliContext(
         session=session,
         url=url.rstrip('/'),
-        s3ff=S3FileFieldClient(url.rstrip('/') + '/s3-upload/'),
+        s3ff=S3FileFieldClient(url.rstrip('/') + '/s3-upload/', session),
         json_output=json_output,
     )