diff --git a/CHANGELOG.md b/CHANGELOG.md
index f70159042..e9f4cd839 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog
 
 ## master - CURRENT
+
+## 3.5.4 - 17/03/2021
 ### Changed
 * Support both `tldextract` 2.x and 3.x
 * Upgrade third-party dependencies
diff --git a/lexicon/providers/powerdns.py b/lexicon/providers/powerdns.py
index e7ecc9049..649717032 100644
--- a/lexicon/providers/powerdns.py
+++ b/lexicon/providers/powerdns.py
@@ -56,7 +56,9 @@ def __init__(self, config):
 
         self.api_endpoint = self._get_provider_option("pdns_server")
         if not self.api_endpoint:
-            raise PowerDNSProviderError('PowerDNS API endpoint not defined (pdns_server)')
+            raise PowerDNSProviderError(
+                "PowerDNS API endpoint not defined (pdns_server)"
+            )
 
         self.disable_slave_notify = self._get_provider_option("pdns-disable-notify")
 
@@ -74,7 +76,7 @@ def __init__(self, config):
 
         self.api_key = self._get_provider_option("auth_token")
         if not self.api_key:
-            raise PowerDNSProviderError('PowerDNS API key not defined (auth_token)')
+            raise PowerDNSProviderError("PowerDNS API key not defined (auth_token)")
 
         self._zone_data = None
 
diff --git a/lexicon/tests/providers/test_auto.py b/lexicon/tests/providers/test_auto.py
index 3bf227389..8156a4670 100644
--- a/lexicon/tests/providers/test_auto.py
+++ b/lexicon/tests/providers/test_auto.py
@@ -1,8 +1,7 @@
 """Integration tests for auto"""
 import socket
-from unittest import TestCase
+from unittest import TestCase, mock
 
-from unittest import mock
 import pytest
 
 from lexicon.providers.auto import _get_ns_records_domains_for_domain
diff --git a/lexicon/tests/test_library.py b/lexicon/tests/test_library.py
index d7d1c94c9..47a65ce6d 100644
--- a/lexicon/tests/test_library.py
+++ b/lexicon/tests/test_library.py
@@ -11,8 +11,8 @@
 import importlib
 import pkgutil
 from types import ModuleType
-
 from unittest import mock
+
 import pytest
 
 from lexicon.config import ConfigResolver
diff --git a/pyproject.toml b/pyproject.toml
index 1ed629767..932044daf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "poetry.masonry.api"
 
 [tool.poetry]
 name = "dns-lexicon"
-version = "3.5.3"
+version = "3.5.4"
 description = "Manipulate DNS records on various DNS providers in a standardized/agnostic way"
 license = "MIT"
 keywords = [