diff --git a/migrations/versions/b37fb68807ea_add_cascading_delete_to_dynamic_.py b/migrations/versions/b37fb68807ea_add_cascading_delete_to_dynamic_.py
index aaf6514..af9a3fc 100644
--- a/migrations/versions/b37fb68807ea_add_cascading_delete_to_dynamic_.py
+++ b/migrations/versions/b37fb68807ea_add_cascading_delete_to_dynamic_.py
@@ -9,21 +9,23 @@ from alembic import op
 
 
 # revision identifiers, used by Alembic.
-revision = 'b37fb68807ea'
-down_revision = '1093835a1051'
+revision = "b37fb68807ea"
+down_revision = "1093835a1051"
 branch_labels = None
 depends_on = None
 
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_constraint(None, 'dynamic_challenge', type_='foreignkey')
-    op.create_foreign_key(None, 'dynamic_challenge', 'challenges', ['id'], ['id'], ondelete='CASCADE')
+    op.drop_constraint(None, "dynamic_challenge", type_="foreignkey")
+    op.create_foreign_key(
+        None, "dynamic_challenge", "challenges", ["id"], ["id"], ondelete="CASCADE"
+    )
     # ### end Alembic commands ###
 
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_constraint(None, 'dynamic_challenge', type_='foreignkey')
-    op.create_foreign_key(None, 'dynamic_challenge', 'challenges', ['id'], ['id'])
+    op.drop_constraint(None, "dynamic_challenge", type_="foreignkey")
+    op.create_foreign_key(None, "dynamic_challenge", "challenges", ["id"], ["id"])
     # ### end Alembic commands ###