diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 18edd38..84e8298 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -24,6 +24,13 @@ repos:
         language: system
         require_serial: true
         types_or: [python, pyi]
+      - id: isort
+        name: isort
+        args: ["--check", "--diff"]
+        entry: poetry run isort
+        language: system
+        require_serial: true
+        types_or: [python, pyi]
       - id: reuse
         name: reuse
         entry: poetry run reuse
diff --git a/examples/test_client.py b/examples/test_client.py
index fac62be..5006852 100644
--- a/examples/test_client.py
+++ b/examples/test_client.py
@@ -20,22 +20,20 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from asyncio import ensure_future, gather, get_event_loop
+import base64
+import hashlib
 import logging
 import struct
 import time
-from asyncio import get_event_loop, gather, ensure_future
 
 from colorlog import ColoredFormatter
-
 from secret_handshake.network import SHSClient
+
 from ssb.muxrpc import MuxRPCAPI, MuxRPCAPIException
 from ssb.packet_stream import PacketStream, PSMessageType
 from ssb.util import load_ssb_secret
 
-import hashlib
-import base64
-
-
 api = MuxRPCAPI()
 
 
diff --git a/examples/test_server.py b/examples/test_server.py
index 8150f6b..46ac6b4 100644
--- a/examples/test_server.py
+++ b/examples/test_server.py
@@ -20,14 +20,14 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from asyncio import ensure_future, gather, get_event_loop
 import logging
-from asyncio import gather, get_event_loop, ensure_future
 
 from colorlog import ColoredFormatter
-
 from secret_handshake import SHSServer
-from ssb.packet_stream import PacketStream
+
 from ssb.muxrpc import MuxRPCAPI
+from ssb.packet_stream import PacketStream
 from ssb.util import load_ssb_secret
 
 api = MuxRPCAPI()
diff --git a/poetry.lock b/poetry.lock
index 47ca8af..95092f8 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -509,20 +509,20 @@ files = [
 
 [[package]]
 name = "isort"
-version = "4.3.21"
+version = "5.12.0"
 description = "A Python utility / library to sort Python imports."
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.8.0"
 files = [
-    {file = "isort-4.3.21-py2.py3-none-any.whl", hash = "sha256:6e811fcb295968434526407adb8796944f1988c5b65e8139058f2014cbe100fd"},
-    {file = "isort-4.3.21.tar.gz", hash = "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1"},
+    {file = "isort-5.12.0-py3-none-any.whl", hash = "sha256:f84c2818376e66cf843d497486ea8fed8700b340f308f076c6fb1229dff318b6"},
+    {file = "isort-5.12.0.tar.gz", hash = "sha256:8bef7dde241278824a6d83f44a544709b065191b95b6e50894bdc722fcba0504"},
 ]
 
 [package.extras]
-pipfile = ["pipreqs", "requirementslib"]
-pyproject = ["toml"]
-requirements = ["pip-api", "pipreqs"]
-xdg-home = ["appdirs (>=1.4.0)"]
+colors = ["colorama (>=0.4.3)"]
+pipfile-deprecated-finder = ["pip-shims (>=0.5.2)", "pipreqs", "requirementslib"]
+plugins = ["setuptools"]
+requirements-deprecated-finder = ["pip-api", "pipreqs"]
 
 [[package]]
 name = "jinja2"
@@ -1241,4 +1241,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "68f8505b0bc199dbcf9d3ea4ae37ee43f36128d05427ea99bd3a09fb201bcd72"
+content-hash = "4eb60a723d8be38d3d197522f58d19f4bdae3887bd006d13ab87fb058c75b467"
diff --git a/pyproject.toml b/pyproject.toml
index e65c003..b00849c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ black = "^23.10.1"
 check-manifest = "^0.39"
 commitizen = "^3.12.0"
 coverage = "^7.3.2"
-isort = "^4.3.20"
+isort = "^5.12.0"
 pep257 = "^0.7.0"
 pytest = "^7.4.3"
 pytest-asyncio = "^0.21.1"
@@ -45,6 +45,11 @@ skip_covered = true
 fail_under = 70
 omit = ["examples/*"]
 
+[tool.isort]
+force_sort_within_sections = true
+line_length = 120
+profile = "black"
+
 [tool.pytest.ini_options]
 addopts = ["--cov=.", "--no-cov-on-fail"]
 python_files = ["tests/test_*.py"]
diff --git a/ssb/feed/__init__.py b/ssb/feed/__init__.py
index f09dad4..75be4ca 100644
--- a/ssb/feed/__init__.py
+++ b/ssb/feed/__init__.py
@@ -20,6 +20,6 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-from .models import Feed, LocalFeed, Message, LocalMessage, NoPrivateKeyException
+from .models import Feed, LocalFeed, LocalMessage, Message, NoPrivateKeyException
 
 __all__ = ("Feed", "LocalFeed", "Message", "LocalMessage", "NoPrivateKeyException")
diff --git a/ssb/feed/models.py b/ssb/feed/models.py
index 097b516..9114c4b 100644
--- a/ssb/feed/models.py
+++ b/ssb/feed/models.py
@@ -20,16 +20,15 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-import datetime
 from base64 import b64encode
-from collections import namedtuple, OrderedDict
+from collections import OrderedDict, namedtuple
+import datetime
 from hashlib import sha256
 
 from simplejson import dumps, loads
 
 from ssb.util import tag
 
-
 OrderedMsg = namedtuple("OrderedMsg", ("previous", "author", "sequence", "timestamp", "hash", "content"))
 
 
diff --git a/ssb/packet_stream.py b/ssb/packet_stream.py
index bb18504..8e3c390 100644
--- a/ssb/packet_stream.py
+++ b/ssb/packet_stream.py
@@ -20,18 +20,16 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-import logging
-import struct
 from asyncio import Event, Queue
 from enum import Enum
-from time import time
+import logging
 from math import ceil
+import struct
+from time import time
 
-import simplejson
 from async_generator import async_generator, yield_
-
 from secret_handshake import SHSClient, SHSServer
-
+import simplejson
 
 logger = logging.getLogger("packet_stream")
 
diff --git a/ssb/util.py b/ssb/util.py
index 281d248..e6e0270 100644
--- a/ssb/util.py
+++ b/ssb/util.py
@@ -20,11 +20,11 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-import os
-import yaml
 from base64 import b64decode, b64encode
+import os
 
 from nacl.signing import SigningKey
+import yaml
 
 
 class ConfigException(Exception):
diff --git a/tests/test_feed.py b/tests/test_feed.py
index 146c12a..c32521e 100644
--- a/tests/test_feed.py
+++ b/tests/test_feed.py
@@ -23,11 +23,10 @@
 from base64 import b64decode
 from collections import OrderedDict
 
-import pytest
 from nacl.signing import SigningKey, VerifyKey
+import pytest
 
-from ssb.feed import LocalMessage, LocalFeed, Feed, Message, NoPrivateKeyException
-
+from ssb.feed import Feed, LocalFeed, LocalMessage, Message, NoPrivateKeyException
 
 SERIALIZED_M1 = b"""{
   "previous": null,
diff --git a/tests/test_packet_stream.py b/tests/test_packet_stream.py
index f6bdbdd..79f95c3 100644
--- a/tests/test_packet_stream.py
+++ b/tests/test_packet_stream.py
@@ -20,13 +20,13 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from asyncio import Event, ensure_future, gather
 import json
-from asyncio import ensure_future, gather, Event
 
-import pytest
 from nacl.signing import SigningKey
-
+import pytest
 from secret_handshake.network import SHSDuplexStream
+
 from ssb.packet_stream import PacketStream, PSMessageType
 
 
diff --git a/tests/test_util.py b/tests/test_util.py
index f45d4d7..a5f33c8 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -25,8 +25,7 @@ from unittest.mock import mock_open, patch
 
 import pytest
 
-from ssb.util import load_ssb_secret, ConfigException
-
+from ssb.util import ConfigException, load_ssb_secret
 
 CONFIG_FILE = """
 ## Comments should be supported too