diff --git a/solvebio/resource/object.py b/solvebio/resource/object.py
index bc94c751..b8012d09 100644
--- a/solvebio/resource/object.py
+++ b/solvebio/resource/object.py
@@ -502,11 +502,7 @@ def upload_file(cls, local_path, remote_path, vault_full_path, **kwargs):
         # Get vault
         vault = Vault.get_by_full_path(vault_full_path, client=_client)
 
-        # Get MD5 and check if multipart upload is needed
-        multipart_threshold = kwargs.get(
-            "multipart_threshold", 64 * 1024 * 1024
-        )  # 64MB default
-        local_md5, _ = md5sum(local_path, multipart_threshold=multipart_threshold)
+        local_md5, _ = md5sum(local_path, None)
 
         # Get a mimetype of file
         mime_tuple = mimetypes.guess_type(local_path)