diff --git a/alembic/versions/31703d707dfb_contributor_name_change.py b/alembic/versions/31703d707dfb_contributor_name_change.py
index 0804cf43..60fa9d5f 100644
--- a/alembic/versions/31703d707dfb_contributor_name_change.py
+++ b/alembic/versions/31703d707dfb_contributor_name_change.py
@@ -5,6 +5,7 @@
 Create Date: 2024-02-20 08:25:11.511833
 
 """
+
 from typing import Sequence, Union
 
 from alembic import op
@@ -12,15 +13,17 @@
 
 
 # revision identifiers, used by Alembic.
-revision: str = '31703d707dfb'
-down_revision: Union[str, None] = '0defbfc71c59'
+revision: str = "31703d707dfb"
+down_revision: Union[str, None] = "0defbfc71c59"
 branch_labels: Union[str, Sequence[str], None] = None
 depends_on: Union[str, Sequence[str], None] = None
 
 
 def upgrade() -> None:
     op.drop_column("dataset_contributor", "name")
-    op.add_column("dataset_contributor", sa.Column("family_name", sa.String, nullable=True))
+    op.add_column(
+        "dataset_contributor", sa.Column("family_name", sa.String, nullable=True)
+    )
     op.add_column("dataset_contributor", sa.Column("given_name", sa.String))
     op.execute("UPDATE dataset_contributor SET given_name = 'name'")
     with op.batch_alter_table("dataset_contributor") as batch_op:
diff --git a/apis/dataset_metadata/dataset_contributor.py b/apis/dataset_metadata/dataset_contributor.py
index fb712985..41336079 100644
--- a/apis/dataset_metadata/dataset_contributor.py
+++ b/apis/dataset_metadata/dataset_contributor.py
@@ -58,10 +58,7 @@ def post(self, study_id: int, dataset_id: int):
                         "type": "string",
                         "minLength": 1,
                     },
-                    "family_name": {
-                        "type":
-                            ["string", "null"]
-                    },
+                    "family_name": {"type": ["string", "null"]},
                     "name_identifier": {
                         "type": "string",
                         "minLength": 1,
@@ -202,10 +199,7 @@ def post(self, study_id: int, dataset_id: int):
                         "type": "string",
                         "minLength": 1,
                     },
-                    "family_name": {
-                        "type":
-                            ["string", "null"]
-                    },
+                    "family_name": {"type": ["string", "null"]},
                     "name_identifier": {
                         "type": "string",
                         "minLength": 1,