diff --git a/src/aleph_client/chains/cosmos.py b/src/aleph_client/chains/cosmos.py
index 43dcd0a6..1a548531 100644
--- a/src/aleph_client/chains/cosmos.py
+++ b/src/aleph_client/chains/cosmos.py
@@ -5,7 +5,8 @@
 import ecdsa
 from cosmospy._wallet import privkey_to_address, privkey_to_pubkey
 
-from .common import BaseAccount, get_fallback_private_key, get_verification_buffer
+from .common import (BaseAccount, get_fallback_private_key,
+                     get_verification_buffer)
 
 DEFAULT_HRP = "cosmos"
 
diff --git a/src/aleph_client/chains/ethereum.py b/src/aleph_client/chains/ethereum.py
index f16bf448..961a5bae 100644
--- a/src/aleph_client/chains/ethereum.py
+++ b/src/aleph_client/chains/ethereum.py
@@ -5,12 +5,8 @@
 from eth_account.messages import encode_defunct
 from eth_account.signers.local import LocalAccount
 
-from .common import (
-    BaseAccount,
-    get_fallback_private_key,
-    get_public_key,
-    get_verification_buffer,
-)
+from .common import (BaseAccount, get_fallback_private_key, get_public_key,
+                     get_verification_buffer)
 
 
 class ETHAccount(BaseAccount):
diff --git a/src/aleph_client/chains/nuls1.py b/src/aleph_client/chains/nuls1.py
index eebc5738..4949d75d 100644
--- a/src/aleph_client/chains/nuls1.py
+++ b/src/aleph_client/chains/nuls1.py
@@ -8,12 +8,8 @@
 
 from coincurve.keys import PrivateKey, PublicKey
 
-from .common import (
-    BaseAccount,
-    get_fallback_private_key,
-    get_public_key,
-    get_verification_buffer,
-)
+from .common import (BaseAccount, get_fallback_private_key, get_public_key,
+                     get_verification_buffer)
 
 LOGGER = logging.getLogger("NULS")
 
diff --git a/src/aleph_client/chains/nuls2.py b/src/aleph_client/chains/nuls2.py
index 71841d99..852911d9 100644
--- a/src/aleph_client/chains/nuls2.py
+++ b/src/aleph_client/chains/nuls2.py
@@ -1,18 +1,10 @@
 import base64
 
-from nuls2.model.data import (
-    NETWORKS,
-    address_from_hash,
-    public_key_to_hash,
-    sign_recoverable_message,
-)
-
-from .common import (
-    BaseAccount,
-    get_fallback_private_key,
-    get_public_key,
-    get_verification_buffer,
-)
+from nuls2.model.data import (NETWORKS, address_from_hash, public_key_to_hash,
+                              sign_recoverable_message)
+
+from .common import (BaseAccount, get_fallback_private_key, get_public_key,
+                     get_verification_buffer)
 
 
 def get_address(public_key=None, private_key=None, chain_id=1, prefix="NULS"):
diff --git a/src/aleph_client/chains/tezos.py b/src/aleph_client/chains/tezos.py
index 4d3bc697..4d0ddb12 100644
--- a/src/aleph_client/chains/tezos.py
+++ b/src/aleph_client/chains/tezos.py
@@ -6,7 +6,8 @@
 from nacl.public import SealedBox
 from nacl.signing import SigningKey
 
-from .common import BaseAccount, get_fallback_private_key, get_verification_buffer
+from .common import (BaseAccount, get_fallback_private_key,
+                     get_verification_buffer)
 
 
 class TezosAccount(BaseAccount):
diff --git a/src/aleph_client/commands/program.py b/src/aleph_client/commands/program.py
index d6ee3017..4ad5aa46 100644
--- a/src/aleph_client/commands/program.py
+++ b/src/aleph_client/commands/program.py
@@ -6,23 +6,15 @@
 from zipfile import BadZipFile
 
 import typer
-from aleph_message.models import (
-    MessagesResponse,
-    ProgramContent,
-    ProgramMessage,
-    StoreMessage,
-)
+from aleph_message.models import (MessagesResponse, ProgramContent,
+                                  ProgramMessage, StoreMessage)
 
 from aleph_client import AuthenticatedUserSession
 from aleph_client.account import _load_account
 from aleph_client.commands import help_strings
-from aleph_client.commands.utils import (
-    input_multiline,
-    prompt_for_volumes,
-    setup_logging,
-    volume_to_dict,
-    yes_no_input,
-)
+from aleph_client.commands.utils import (input_multiline, prompt_for_volumes,
+                                         setup_logging, volume_to_dict,
+                                         yes_no_input)
 from aleph_client.conf import settings
 from aleph_client.types import AccountFromPrivateKey, StorageEnum
 from aleph_client.utils import create_archive
diff --git a/src/aleph_client/user_session.py b/src/aleph_client/user_session.py
index 59064c18..f53af4f4 100644
--- a/src/aleph_client/user_session.py
+++ b/src/aleph_client/user_session.py
@@ -7,51 +7,25 @@
 import time
 from datetime import datetime
 from pathlib import Path
-from typing import (
-    Any,
-    AsyncIterable,
-    Awaitable,
-    Callable,
-    Dict,
-    Iterable,
-    List,
-    Mapping,
-    NoReturn,
-    Optional,
-    Tuple,
-    Type,
-    TypeVar,
-    Union,
-)
+from typing import (Any, AsyncIterable, Awaitable, Callable, Dict, Iterable,
+                    List, Mapping, NoReturn, Optional, Tuple, Type, TypeVar,
+                    Union)
 
 import aiohttp
-from aleph_message.models import (
-    AggregateContent,
-    AggregateMessage,
-    AlephMessage,
-    ForgetContent,
-    ForgetMessage,
-    ItemType,
-    Message,
-    MessageType,
-    PostContent,
-    PostMessage,
-    ProgramMessage,
-    StoreContent,
-    StoreMessage,
-)
+from aleph_message.models import (AggregateContent, AggregateMessage,
+                                  AlephMessage, ForgetContent, ForgetMessage,
+                                  ItemType, Message, MessageType, PostContent,
+                                  PostMessage, ProgramMessage, StoreContent,
+                                  StoreMessage)
 from aleph_message.models.program import Encoding, ProgramContent
 from pydantic import ValidationError
 
-from aleph_client.types import Account, GenericMessage, MessageStatus, StorageEnum
+from aleph_client.types import (Account, GenericMessage, MessageStatus,
+                                StorageEnum)
 
 from .conf import settings
-from .exceptions import (
-    BroadcastError,
-    InvalidMessageError,
-    MessageNotFoundError,
-    MultipleMessagesError,
-)
+from .exceptions import (BroadcastError, InvalidMessageError,
+                         MessageNotFoundError, MultipleMessagesError)
 from .models import MessagesResponse
 from .utils import get_message_type_value
 
diff --git a/src/aleph_client/vm/app.py b/src/aleph_client/vm/app.py
index 0077885e..5467b2a4 100644
--- a/src/aleph_client/vm/app.py
+++ b/src/aleph_client/vm/app.py
@@ -1,14 +1,6 @@
 from dataclasses import dataclass
-from typing import (
-    Any,
-    Awaitable,
-    Callable,
-    Dict,
-    List,
-    Mapping,
-    MutableMapping,
-    Optional,
-)
+from typing import (Any, Awaitable, Callable, Dict, List, Mapping,
+                    MutableMapping, Optional)
 
 AsgiApplication = Callable
 
diff --git a/tests/unit/test_asynchronous.py b/tests/unit/test_asynchronous.py
index de4b5963..5c81003e 100644
--- a/tests/unit/test_asynchronous.py
+++ b/tests/unit/test_asynchronous.py
@@ -2,13 +2,8 @@
 from unittest.mock import AsyncMock, MagicMock
 
 import pytest as pytest
-from aleph_message.models import (
-    AggregateMessage,
-    ForgetMessage,
-    PostMessage,
-    ProgramMessage,
-    StoreMessage,
-)
+from aleph_message.models import (AggregateMessage, ForgetMessage, PostMessage,
+                                  ProgramMessage, StoreMessage)
 
 from aleph_client import AuthenticatedUserSession
 from aleph_client.types import Account, MessageStatus, StorageEnum
diff --git a/tests/unit/test_chain_nuls1_compat.py b/tests/unit/test_chain_nuls1_compat.py
index 65869162..5957a3e4 100644
--- a/tests/unit/test_chain_nuls1_compat.py
+++ b/tests/unit/test_chain_nuls1_compat.py
@@ -10,7 +10,8 @@
 from coincurve.keys import PrivateKey
 
 from aleph_client.chains.common import get_fallback_private_key
-from aleph_client.chains.nuls1 import LOGGER, MESSAGE_TEMPLATE, NulsSignature, VarInt
+from aleph_client.chains.nuls1 import (LOGGER, MESSAGE_TEMPLATE, NulsSignature,
+                                       VarInt)
 
 SECRET = (
     b"\xc4\xfe\xe65\x96\x14\xb4:\r: \x05;\x12j\x9bJ"
diff --git a/tests/unit/test_utils.py b/tests/unit/test_utils.py
index 0671bf24..1a40936a 100644
--- a/tests/unit/test_utils.py
+++ b/tests/unit/test_utils.py
@@ -1,11 +1,5 @@
-from aleph_message.models import (
-    AggregateMessage,
-    ForgetMessage,
-    MessageType,
-    PostMessage,
-    ProgramMessage,
-    StoreMessage,
-)
+from aleph_message.models import (AggregateMessage, ForgetMessage, MessageType,
+                                  PostMessage, ProgramMessage, StoreMessage)
 
 from aleph_client.utils import get_message_type_value