diff --git a/migrations/versions/e8d2a7570f70_.py b/migrations/versions/e8d2a7570f70_.py
index 938bc21..1bb13b7 100644
--- a/migrations/versions/e8d2a7570f70_.py
+++ b/migrations/versions/e8d2a7570f70_.py
@@ -11,7 +11,7 @@ import sqlalchemy_utils
 
 
 # revision identifiers, used by Alembic.
-revision = 'e8d2a7570f70'
+revision = "e8d2a7570f70"
 down_revision = None
 branch_labels = None
 depends_on = None
@@ -19,64 +19,79 @@ depends_on = None
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.create_table('blacklist_tokens',
-    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
-    sa.Column('token', sa.String(length=500), nullable=False),
-    sa.Column('expires', sa.DateTime(), nullable=False),
-    sa.PrimaryKeyConstraint('id', name=op.f('pk_blacklist_tokens')),
-    sa.UniqueConstraint('token', name=op.f('uq_blacklist_tokens_token'))
+    op.create_table(
+        "blacklist_tokens",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("token", sa.String(length=500), nullable=False),
+        sa.Column("expires", sa.DateTime(), nullable=False),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_blacklist_tokens")),
+        sa.UniqueConstraint("token", name=op.f("uq_blacklist_tokens_token")),
     )
-    op.create_table('server_settings',
-    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
-    sa.Column('default_permissions_number', sa.BigInteger(), nullable=False),
-    sa.PrimaryKeyConstraint('id', name=op.f('pk_server_settings'))
+    op.create_table(
+        "server_settings",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("default_permissions_number", sa.BigInteger(), nullable=False),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_server_settings")),
     )
-    op.create_table('users',
-    sa.Column('username', sa.String(length=255), nullable=False),
-    sa.Column('password_hash', sa.String(length=255), nullable=False),
-    sa.Column('register_date', sa.DateTime(), nullable=False),
-    sa.Column('permissions_number', sa.BigInteger(), nullable=False),
-    sa.PrimaryKeyConstraint('username', name=op.f('pk_users')),
-    sa.UniqueConstraint('username', name=op.f('uq_users_username'))
+    op.create_table(
+        "users",
+        sa.Column("username", sa.String(length=255), nullable=False),
+        sa.Column("password_hash", sa.String(length=255), nullable=False),
+        sa.Column("register_date", sa.DateTime(), nullable=False),
+        sa.Column("permissions_number", sa.BigInteger(), nullable=False),
+        sa.PrimaryKeyConstraint("username", name=op.f("pk_users")),
+        sa.UniqueConstraint("username", name=op.f("uq_users_username")),
     )
-    op.create_table('shares',
-    sa.Column('share_id', sqlalchemy_utils.types.uuid.UUIDType(), nullable=False),
-    sa.Column('owner_name', sa.String(), nullable=True),
-    sa.Column('initialized', sa.Boolean(), nullable=False),
-    sa.Column('locked', sa.Boolean(), nullable=False),
-    sa.Column('create_date', sa.DateTime(), nullable=False),
-    sa.Column('file_name', sa.String(), nullable=False),
-    sa.ForeignKeyConstraint(['owner_name'], ['users.username'], name=op.f('fk_shares_owner_name_users')),
-    sa.PrimaryKeyConstraint('share_id', name=op.f('pk_shares'))
+    op.create_table(
+        "shares",
+        sa.Column("share_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=False),
+        sa.Column("owner_name", sa.String(), nullable=True),
+        sa.Column("initialized", sa.Boolean(), nullable=False),
+        sa.Column("locked", sa.Boolean(), nullable=False),
+        sa.Column("create_date", sa.DateTime(), nullable=False),
+        sa.Column("file_name", sa.String(), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["owner_name"], ["users.username"], name=op.f("fk_shares_owner_name_users")
+        ),
+        sa.PrimaryKeyConstraint("share_id", name=op.f("pk_shares")),
     )
-    op.create_table('uploads',
-    sa.Column('upload_id', sa.String(), nullable=False),
-    sa.Column('share_id', sqlalchemy_utils.types.uuid.UUIDType(), nullable=True),
-    sa.Column('create_date', sa.DateTime(), nullable=False),
-    sa.Column('total_chunks', sa.Integer(), nullable=False),
-    sa.Column('recv_chunks', sa.Integer(), nullable=False),
-    sa.Column('completed', sa.Boolean(), nullable=False),
-    sa.ForeignKeyConstraint(['share_id'], ['shares.share_id'], name=op.f('fk_uploads_share_id_shares')),
-    sa.PrimaryKeyConstraint('upload_id', name=op.f('pk_uploads'))
+    op.create_table(
+        "uploads",
+        sa.Column("upload_id", sa.String(), nullable=False),
+        sa.Column("share_id", sqlalchemy_utils.types.uuid.UUIDType(), nullable=True),
+        sa.Column("create_date", sa.DateTime(), nullable=False),
+        sa.Column("total_chunks", sa.Integer(), nullable=False),
+        sa.Column("recv_chunks", sa.Integer(), nullable=False),
+        sa.Column("completed", sa.Boolean(), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["share_id"], ["shares.share_id"], name=op.f("fk_uploads_share_id_shares")
+        ),
+        sa.PrimaryKeyConstraint("upload_id", name=op.f("pk_uploads")),
     )
-    op.create_table('chunks',
-    sa.Column('chunk_id', sa.Integer(), autoincrement=True, nullable=False),
-    sa.Column('create_date', sa.DateTime(), nullable=False),
-    sa.Column('index', sa.Integer(), nullable=False),
-    sa.Column('upload_id', sa.String(), nullable=True),
-    sa.Column('filename', sa.String(), nullable=False),
-    sa.ForeignKeyConstraint(['upload_id'], ['uploads.upload_id'], name=op.f('fk_chunks_upload_id_uploads'), ondelete='CASCADE'),
-    sa.PrimaryKeyConstraint('chunk_id', name=op.f('pk_chunks'))
+    op.create_table(
+        "chunks",
+        sa.Column("chunk_id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("create_date", sa.DateTime(), nullable=False),
+        sa.Column("index", sa.Integer(), nullable=False),
+        sa.Column("upload_id", sa.String(), nullable=True),
+        sa.Column("filename", sa.String(), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["upload_id"],
+            ["uploads.upload_id"],
+            name=op.f("fk_chunks_upload_id_uploads"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("chunk_id", name=op.f("pk_chunks")),
     )
     # ### end Alembic commands ###
 
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_table('chunks')
-    op.drop_table('uploads')
-    op.drop_table('shares')
-    op.drop_table('users')
-    op.drop_table('server_settings')
-    op.drop_table('blacklist_tokens')
+    op.drop_table("chunks")
+    op.drop_table("uploads")
+    op.drop_table("shares")
+    op.drop_table("users")
+    op.drop_table("server_settings")
+    op.drop_table("blacklist_tokens")
     # ### end Alembic commands ###