diff --git a/backend/oasst_backend/models/text_labels.py b/backend/oasst_backend/models/text_labels.py
index ce418b8f..b7ff08cf 100644
--- a/backend/oasst_backend/models/text_labels.py
+++ b/backend/oasst_backend/models/text_labels.py
@@ -21,5 +21,7 @@ class TextLabels(SQLModel, table=True):
     )
     api_client_id: UUID = Field(nullable=False, foreign_key="api_client.id")
     text: str = Field(nullable=False, max_length=2**16)
-    message_id: Optional[UUID] = Field(sa_column=sa.Column(pg.UUID(as_uuid=True), sa.ForeignKey("message.id"), nullable=True))
+    message_id: Optional[UUID] = Field(
+        sa_column=sa.Column(pg.UUID(as_uuid=True), sa.ForeignKey("message.id"), nullable=True)
+    )
     labels: dict[str, float] = Field(default={}, sa_column=sa.Column(pg.JSONB), nullable=False)