diff --git a/charm/charmcraft.yaml b/charm/charmcraft.yaml
index 9f835e2..262c0d2 100644
--- a/charm/charmcraft.yaml
+++ b/charm/charmcraft.yaml
@@ -11,6 +11,6 @@ bases:
         channel: "20.04"
 parts:
   charm:
-    charm-binary-python-packages: [cryptography, jsonschema]
+    charm-binary-python-packages: [cryptography, jsonschema, pydantic-core]
     build-packages:
       - git
diff --git a/charm/src/charm.py b/charm/src/charm.py
index e8133c8..e35838c 100755
--- a/charm/src/charm.py
+++ b/charm/src/charm.py
@@ -14,23 +14,18 @@
 from typing import Optional, cast
 from urllib.parse import urlparse
 
-from charms.catalogue_k8s.v1.catalogue import (
-    CatalogueItemsChangedEvent,
-    CatalogueProvider,
-)
+from charms.catalogue_k8s.v1.catalogue import CatalogueItemsChangedEvent, CatalogueProvider
 from charms.observability_libs.v1.cert_handler import CertHandler
 from charms.tempo_k8s.v1.charm_tracing import trace_charm
 from charms.tempo_k8s.v2.tracing import TracingEndpointRequirer
-from charms.traefik_k8s.v2.ingress import (
-    IngressPerAppReadyEvent,
-    IngressPerAppRequirer,
-)
-from nginx_config import CA_CERT_PATH, CERT_PATH, KEY_PATH, NGINX_CONFIG_PATH, NginxConfigBuilder
+from charms.traefik_k8s.v2.ingress import IngressPerAppReadyEvent, IngressPerAppRequirer
 from ops.charm import ActionEvent, CharmBase
 from ops.main import main
 from ops.model import ActiveStatus, BlockedStatus, WaitingStatus
 from ops.pebble import ChangeError, Error, Layer, PathError, ProtocolError
 
+from nginx_config import CA_CERT_PATH, CERT_PATH, KEY_PATH, NGINX_CONFIG_PATH, NginxConfigBuilder
+
 logger = logging.getLogger(__name__)
 
 ROOT_PATH = "/web"
diff --git a/charm/tests/unit/test_charm.py b/charm/tests/unit/test_charm.py
index 76fe4fa..f9fddee 100644
--- a/charm/tests/unit/test_charm.py
+++ b/charm/tests/unit/test_charm.py
@@ -10,12 +10,13 @@
 from unittest.mock import Mock, patch
 from urllib.parse import urlparse
 
-from charm import CatalogueCharm
 from charms.catalogue_k8s.v1.catalogue import DEFAULT_RELATION_NAME
 from ops.charm import ActionEvent
 from ops.model import ActiveStatus
 from ops.testing import Harness
 
+from charm import CatalogueCharm
+
 CONTAINER_NAME = "catalogue"
 
 
diff --git a/charm/tox.ini b/charm/tox.ini
index fe0c7ba..f3583d0 100644
--- a/charm/tox.ini
+++ b/charm/tox.ini
@@ -32,9 +32,11 @@ description = Apply coding style standards to code
 deps =
     black
     ruff
+    isort
 commands =
-    ruff --fix {[vars]all_path}
+    isort {[vars]all_path}
     black {[vars]all_path}
+    ruff check {[vars]all_path} --fix
 
 [testenv:lint]
 description = Check code against coding style standards
@@ -46,7 +48,7 @@ commands =
     codespell {[vars]lib_path}
     codespell . --skip .git --skip .tox --skip build --skip lib --skip venv --skip .mypy_cache --skip nginx_config.py --skip tox.ini
     codespell src/nginx_config.py -L anull
-    ruff {[vars]all_path}
+    ruff check {[vars]all_path}
     black --check --diff {[vars]all_path}
 
 [testenv:static-{charm,lib}]