diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3e77ad0..caf11db 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,30 +9,24 @@ repos:
   hooks:
   # - id: check-yaml
   - id: end-of-file-fixer
-    stages: [commit]
-  - id: trailing-whitespace
-    stages: [commit]
-  - id: debug-statements
-    stages: [push]
-
-## Isort
-- repo: https://github.com/pycqa/isort
-  rev: 5.12.0
-  hooks:
-  - id: isort
-    name: isort
     stages: [pre-commit]
-
-## Black
-- repo: https://github.com/psf/black
-  rev: 23.3.0
-  hooks:
-  - id: black
+  - id: trailing-whitespace
     stages: [pre-commit]
+  - id: debug-statements
+    stages: [pre-push]
 
 ## Ruff
 - repo: https://github.com/charliermarsh/ruff-pre-commit
-  rev: v0.0.260
+  rev: v0.5.0
   hooks:
   - id: ruff
+    args: [--fix]
+    stages: [pre-commit]
+  - id: ruff-format
     stages: [pre-commit]
+
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.3.0
+  hooks:
+  - id: check-merge-conflict
+    args: [--assume-in-merge]
diff --git a/ckanext/relationship/helpers.py b/ckanext/relationship/helpers.py
index bda4452..eae4935 100644
--- a/ckanext/relationship/helpers.py
+++ b/ckanext/relationship/helpers.py
@@ -19,7 +19,7 @@ def get_helpers():
 
 
 def relationship_get_entity_list(entity, entity_type, include_private=True):
-    """Return ids list of specified entity (entity, entity_type)"""
+    """Return ids list of specified entity (entity, entity_type)."""
     context = {}
     if entity == "package":
         entity_list = tk.get_action("package_search")(
@@ -87,7 +87,7 @@ def relationship_get_selected_json(selected_ids: list | None = None) -> str:
         try:
             pkg_dict = tk.get_action("package_show")({}, {"id": pkg_id})
             selected_pkgs.append({"name": pkg_dict["id"], "title": pkg_dict["title"]})
-        except Exception:
+        except (tk.ObjectNotFound, tk.NotAuthorized):
             continue
     return json.dumps(selected_pkgs)
 
diff --git a/ckanext/relationship/logic/action.py b/ckanext/relationship/logic/action.py
index aeb22d3..cb8a161 100644
--- a/ckanext/relationship/logic/action.py
+++ b/ckanext/relationship/logic/action.py
@@ -33,7 +33,8 @@ def get_actions():
 @validate(schema.relation_create)
 def relationship_relation_create(context, data_dict) -> list[dict[str, str]]:
     """Create relation with specified type (relation_type) between two entities
-    specified by ids (subject_id, object_id). Also create reverse relation."""
+    specified by ids (subject_id, object_id). Also create reverse relation.
+    """
     tk.check_access("relationship_relation_create", context, data_dict)
 
     subject_id = data_dict["subject_id"]
@@ -65,7 +66,8 @@ def relationship_relation_create(context, data_dict) -> list[dict[str, str]]:
 @validate(schema.relation_delete)
 def relationship_relation_delete(context, data_dict) -> list[dict[str, str]]:
     """Delete relation with specified type (relation_type) between two entities
-    specified by ids (subject_id, object_id). Also delete reverse relation."""
+    specified by ids (subject_id, object_id). Also delete reverse relation.
+    """
     tk.check_access("relationship_relation_delete", context, data_dict)
 
     subject_id = data_dict["subject_id"]
@@ -165,7 +167,7 @@ def relationship_relations_ids_list(context, data_dict) -> list[str]:
 
 @validate(schema.get_entity_list)
 def relationship_get_entity_list(context, data_dict) -> list[str]:
-    """Return ids list of specified entity (entity, entity_type)"""
+    """Return ids list of specified entity (entity, entity_type)."""
     tk.check_access("relationship_get_entity_list", context, data_dict)
 
     model = context["model"]
diff --git a/ckanext/relationship/logic/auth.py b/ckanext/relationship/logic/auth.py
index 76cda8a..44a79f2 100644
--- a/ckanext/relationship/logic/auth.py
+++ b/ckanext/relationship/logic/auth.py
@@ -1,5 +1,8 @@
 from __future__ import annotations
 
+from typing import Any
+
+from ckan import types
 from ckan.plugins import toolkit as tk
 
 
@@ -15,29 +18,32 @@ def get_auth_functions():
     return {f.__name__: f for f in auth_functions}
 
 
-def relationship_relation_create(context, data_dict):
+def relationship_relation_create(context: types.Context, data_dict: dict[str, Any]):
     return {"success": True}
 
 
-def relationship_relation_delete(context, data_dict):
+def relationship_relation_delete(context: types.Context, data_dict: dict[str, Any]):
     return {"success": True}
 
 
 @tk.auth_allow_anonymous_access
-def relationship_relations_list(context, data_dict):
+def relationship_relations_list(context: types.Context, data_dict: dict[str, Any]):
     return {"success": True}
 
 
 @tk.auth_allow_anonymous_access
-def relationship_relations_ids_list(context, data_dict):
+def relationship_relations_ids_list(context: types.Context, data_dict: dict[str, Any]):
     return {"success": True}
 
 
 @tk.auth_allow_anonymous_access
-def relationship_get_entity_list(context, data_dict):
+def relationship_get_entity_list(context: types.Context, data_dict: dict[str, Any]):
     return {"success": True}
 
 
 @tk.auth_allow_anonymous_access
-def relationship_relationship_autocomplete(context, data_dict):
+def relationship_relationship_autocomplete(
+    context: types.Context,
+    data_dict: dict[str, Any],
+):
     return {"success": True}
diff --git a/ckanext/relationship/logic/validators.py b/ckanext/relationship/logic/validators.py
index 24f3b3d..cf12065 100644
--- a/ckanext/relationship/logic/validators.py
+++ b/ckanext/relationship/logic/validators.py
@@ -39,8 +39,7 @@ def validator(key, data, errors, context):
         )
 
         selected_relations = get_selected_relations(data[key])
-
-        data[key] = json.dumps([value for value in selected_relations])
+        data[key] = json.dumps(list(selected_relations))
 
         add_relations = selected_relations - current_relations
         del_relations = current_relations - selected_relations
@@ -76,7 +75,7 @@ def get_current_relations(
     return set(current_relations)
 
 
-def get_selected_relations(selected_relations):
+def get_selected_relations(selected_relations: list | str | None) -> set[str]:
     if isinstance(selected_relations, string_types) and "," in selected_relations:
         selected_relations = selected_relations.split(",")
 
diff --git a/ckanext/relationship/migration/relationship/env.py b/ckanext/relationship/migration/relationship/env.py
index 2d1f539..25ba762 100644
--- a/ckanext/relationship/migration/relationship/env.py
+++ b/ckanext/relationship/migration/relationship/env.py
@@ -38,7 +38,6 @@ def run_migrations_offline():
     script output.
 
     """
-
     url = config.get_main_option("sqlalchemy.url")
     context.configure(
         url=url,
diff --git a/ckanext/relationship/migration/relationship/versions/520e6ea9f57c_create_relationship_table.py b/ckanext/relationship/migration/relationship/versions/520e6ea9f57c_create_relationship_table.py
index 103f286..770a23f 100644
--- a/ckanext/relationship/migration/relationship/versions/520e6ea9f57c_create_relationship_table.py
+++ b/ckanext/relationship/migration/relationship/versions/520e6ea9f57c_create_relationship_table.py
@@ -1,4 +1,4 @@
-"""Create relationship table
+"""Create relationship table.
 
 Revision ID: aca2ff1d3ce4
 Revises:
diff --git a/ckanext/relationship/model/relationship.py b/ckanext/relationship/model/relationship.py
index fa3ca50..a938cb6 100644
--- a/ckanext/relationship/model/relationship.py
+++ b/ckanext/relationship/model/relationship.py
@@ -92,10 +92,7 @@ def by_subject_id(
 
 
 def _entity_name_by_id(entity_id):
-    """
-    Returns entity (package or organization or group) name by its id
-    """
-
+    """Returns entity (package or organization or group) name by its id."""
     pkg = (
         model.Session.query(model.Package)
         .filter(model.Package.id == entity_id)
diff --git a/ckanext/relationship/plugin.py b/ckanext/relationship/plugin.py
index 09d3403..120787b 100644
--- a/ckanext/relationship/plugin.py
+++ b/ckanext/relationship/plugin.py
@@ -1,10 +1,10 @@
 import ckan.plugins.toolkit as tk
 from ckan import plugins
+from ckan.common import CKANConfig
 from ckan.lib.search import rebuild
 from ckan.logic import NotFound
 
 import ckanext.scheming.helpers as sch
-
 from ckanext.relationship import helpers, utils, views
 from ckanext.relationship.logic import action, auth, validators
 
@@ -19,7 +19,7 @@ class RelationshipPlugin(plugins.SingletonPlugin):
     plugins.implements(plugins.IPackageController, inherit=True)
 
     # IConfigurer
-    def update_config(self, config_):
+    def update_config(self, config_: CKANConfig):
         tk.add_template_directory(config_, "templates")
         tk.add_public_directory(config_, "public")
         tk.add_resource("assets", "relationship")
diff --git a/ckanext/relationship/tests/test_plugin.py b/ckanext/relationship/tests/test_plugin.py
index 05bd059..017dcd3 100644
--- a/ckanext/relationship/tests/test_plugin.py
+++ b/ckanext/relationship/tests/test_plugin.py
@@ -1,5 +1,4 @@
-"""
-Tests for plugin.py.
+"""Tests for plugin.py.
 
 Tests are written using the pytest library (https://docs.pytest.org), and you
 should read the testing guidelines in the CKAN docs:
diff --git a/requirements.txt b/requirements.txt
index 10ef97e..e69de29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +0,0 @@
-ckanext-scheming
\ No newline at end of file
diff --git a/setup.py b/setup.py
index cae381c..7ffbc01 100644
--- a/setup.py
+++ b/setup.py
@@ -1,81 +1,6 @@
-# Always prefer setuptools over distutils
-from codecs import open  # To use a consistent encoding
-from os import path
-
-from setuptools import find_packages, setup
-
-here = path.abspath(path.dirname(__file__))
-
-# Get the long description from the relevant file
-with open(path.join(here, "README.md"), encoding="utf-8") as f:
-    long_description = f.read()
+from setuptools import setup
 
 setup(
-    name="""ckanext-relationship""",
-    # Versions should comply with PEP440.  For a discussion on single-sourcing
-    # the version across setup.py and the project code, see
-    # http://packaging.python.org/en/latest/tutorial.html#version
-    version="0.2.9",
-    description="""""",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    # The project's main homepage.
-    url="https://github.com/DataShades/ckanext-relationship",
-    # Author details
-    author="""Oleksandr Ivaniuk""",
-    author_email="""aleks.ivaniuk@gmail.com""",
-    # Choose your license
-    license="AGPL",
-    # See https://pypi.python.org/pypi?%3Aaction=list_classifiers
-    classifiers=[
-        # How mature is this project? Common values are
-        # 3 - Alpha
-        # 4 - Beta
-        # 5 - Production/Stable
-        "Development Status :: 4 - Beta",
-        # Pick your license as you wish (should match "license" above)
-        (
-            "License :: OSI Approved :: GNU Affero General Public License v3"
-            " or later (AGPLv3+)"
-        ),
-        # Specify the Python versions you support here. In particular, ensure
-        # that you indicate whether you support Python 2, Python 3 or both.
-        "Programming Language :: Python :: 2.7",
-    ],
-    # What does your project relate to?
-    keywords="""CKAN""",
-    # You can just specify the packages manually here if your project is
-    # simple. Or you can use find_packages().
-    packages=find_packages(exclude=["contrib", "docs", "tests*"]),
-    namespace_packages=["ckanext"],
-    install_requires=[
-        # CKAN extensions should not list dependencies here, but in a separate
-        # ``requirements.txt`` file.
-        #
-        # http://docs.ckan.org/en/latest/extensions/best-practices.html
-        # add-third-party-libraries-to-requirements-txt
-    ],
-    # If there are data files included in your packages that need to be
-    # installed, specify them here.  If using Python 2.6 or less, then these
-    # have to be included in MANIFEST.in as well.
-    include_package_data=True,
-    package_data={},
-    # Although 'package_data' is the preferred approach, in some case you may
-    # need to place data files outside of your packages.
-    # see http://docs.python.org/3.4/distutils/setupscript.html
-    # installing-additional-files
-    # In this case, 'data_file' will be installed into '<sys.prefix>/my_data'
-    data_files=[],
-    # To provide executable scripts, use entry points in preference to the
-    # "scripts" keyword. Entry points provide cross-platform support and allow
-    # pip to create the appropriate form of executable for the target platform.
-    entry_points="""
-        [ckan.plugins]
-        relationship=ckanext.relationship.plugin:RelationshipPlugin
-
-        [babel.extractors]
-        ckan = ckan.lib.extract:extract_ckan
-    """,
     # If you are changing from the default layout of your extension, you may
     # have to change the message extractors, you can read more about babel
     # message extraction at