diff --git a/src/baskerville/helpers/gcs_utils.py b/src/baskerville/helpers/gcs_utils.py
index 178db07..af398d0 100644
--- a/src/baskerville/helpers/gcs_utils.py
+++ b/src/baskerville/helpers/gcs_utils.py
@@ -157,7 +157,7 @@ def upload_folder_gcs(local_dir: str, gcs_dir: str) -> None:
     """
     storage_client = _get_storage_client()
     bucket_name = gcs_dir.split("//")[1].split("/")[0]
-    gcs_object_prefix = '/'.join(gcs_dir.split("//")[1].split("/")[1:])
+    gcs_object_prefix = "/".join(gcs_dir.split("//")[1].split("/")[1:])
     local_prefix = local_dir.split("/")[-1]
     bucket = storage_client.bucket(bucket_name)
     for filename in os.listdir(local_dir):