diff --git a/CHANGELOG.md b/CHANGELOG.md
index 306a4e19..786988db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## V4.2.0 - 17 April 2023
+
+### Added
+- Editing of domain lists via spreadsheets (uploading and downloading spreadsheet files)
+- Tag/label support in spreadsheet uploads and downloads
+- Be able to automatically share the latest report of a list
+- Signup form for easier onboarding
+
+### Changed
+- www subdomain discovery has been replaced with crt.sh subdomain discovery
+- Support for Django 4.2, with psql12
+- Minimum python version is now 3.10
+
 
 ## V4.1.0 - 7 February 2023
 
diff --git a/Makefile b/Makefile
index a665fd78..f61b7caa 100644
--- a/Makefile
+++ b/Makefile
@@ -262,7 +262,7 @@ pylint: ${app}
 	DJANGO_SETTINGS_MODULE=${app_name}.settings ${bin}/pylint --load-plugins pylint_django dashboard
 
 .QA: qa
-qa: fix pylint bandit mypy vulture check test ruff
+qa: fix pylint bandit vulture check test ruff
 
 
 ## Utility
diff --git a/dashboard/internet_nl_dashboard/logic/__init__.py b/dashboard/internet_nl_dashboard/logic/__init__.py
index 6775b2a2..c972731e 100644
--- a/dashboard/internet_nl_dashboard/logic/__init__.py
+++ b/dashboard/internet_nl_dashboard/logic/__init__.py
@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: Apache-2.0
 from datetime import datetime, timezone
-from typing import Any, Dict
+from typing import Any, Dict, Optional
 
 
 def operation_response(
-        error: bool = False, success: bool = False, message: str = "", data: Dict = None
+        error: bool = False, success: bool = False, message: str = "", data: Optional[Dict[Any, Any]] = None
 ) -> Dict[str, Any]:
     return {'error': error,
             'success': success,
diff --git a/dashboard/internet_nl_dashboard/logic/domains.py b/dashboard/internet_nl_dashboard/logic/domains.py
index bf6e17de..472324a5 100644
--- a/dashboard/internet_nl_dashboard/logic/domains.py
+++ b/dashboard/internet_nl_dashboard/logic/domains.py
@@ -2,7 +2,7 @@
 import logging
 import re
 from datetime import datetime, timezone
-from typing import Any, Dict, List, Tuple
+from typing import Any, Dict, List, Tuple, Union
 
 import pyexcel as p
 import tldextract
@@ -330,7 +330,7 @@ def update_list_settings(account: Account, user_input: Dict) -> Dict[str, Any]:
         to_attr='last_report'
     )
 
-    urllist = UrlList.objects.all().filter(
+    urllist: UrlList = UrlList.objects.all().filter(
         account=account,
         id=user_input['id'],
         is_deleted=False
@@ -762,7 +762,7 @@ def _add_to_urls_to_urllist_nicer(account: Account, current_list: UrlList, urls:
     return counters
 
 
-def clean_urls(urls: List[str]) -> Dict[str, List]:
+def clean_urls(urls: List[str]) -> Dict[str, List[Union[str, int]]]:
     """
     Incorrect urls are urls that are not following the uri scheme standard and don't have a recognizable suffix. They
     are returned for informational purposes and can contain utter garbage. The editor of the urls can then easily see
@@ -772,7 +772,7 @@ def clean_urls(urls: List[str]) -> Dict[str, List]:
     :return:
     """
 
-    result: Dict[str, List] = {'incorrect': [], 'correct': []}
+    result: Dict[str, List[Union[str, int]]] = {'incorrect': [], 'correct': []}
 
     for url in urls:
         # all urls in the system must be lowercase (if applicable to used character)
diff --git a/dashboard/internet_nl_dashboard/logic/shared_report_lists.py b/dashboard/internet_nl_dashboard/logic/shared_report_lists.py
index 5b1bcc2d..c32d37c6 100644
--- a/dashboard/internet_nl_dashboard/logic/shared_report_lists.py
+++ b/dashboard/internet_nl_dashboard/logic/shared_report_lists.py
@@ -1,4 +1,4 @@
-from typing import Dict, List
+from typing import Dict, List, Optional
 
 from django.db.models import Prefetch
 
@@ -6,7 +6,7 @@
 from dashboard.internet_nl_dashboard.models import UrlList, UrlListReport
 
 
-def get_latest_report_id_from_list_and_type(urllist_id: int, report_type: str = '') -> Dict[str, int]:
+def get_latest_report_id_from_list_and_type(urllist_id: int, report_type: str = '') -> Dict[str, str]:
     report = UrlListReport.objects.filter(urllist=urllist_id, is_publicly_shared=True)
 
     if report_type in {"web", "mail"}:
@@ -17,7 +17,7 @@ def get_latest_report_id_from_list_and_type(urllist_id: int, report_type: str =
     return (
         {'latest_report_public_report_code': found_report.public_report_code}
         if found_report
-        else {'latest_report_public_report_code': None}
+        else {'latest_report_public_report_code': ''}
     )
 
 
@@ -25,7 +25,7 @@ def get_publicly_shared_lists_per_account_and_list_id(account_id: int, urllist_i
     return get_publicly_shared_lists_per_account(account_id, urllist_id)
 
 
-def get_publicly_shared_lists_per_account(account_id, urllist_id: int = None) -> List[dict]:
+def get_publicly_shared_lists_per_account(account_id, urllist_id: Optional[int] = None) -> List[dict]:
 
     log.debug(f"get_publicly_shared_lists_per_account account_id: {account_id}")
 
diff --git a/dashboard/internet_nl_dashboard/logic/spreadsheet.py b/dashboard/internet_nl_dashboard/logic/spreadsheet.py
index 4dd81911..990dacf4 100644
--- a/dashboard/internet_nl_dashboard/logic/spreadsheet.py
+++ b/dashboard/internet_nl_dashboard/logic/spreadsheet.py
@@ -131,7 +131,7 @@ def get_data(file: str) -> Dict[str, Dict[str, Dict[str, set]]]:
     :return:
     """
 
-    data: Dict[str] = {}
+    data: Dict[str, Any] = {}
 
     try:
         sheet = p.get_sheet(file_name=file, name_columns_by_row=0)
diff --git a/dashboard/internet_nl_dashboard/logic/urllist_dashboard_report.py b/dashboard/internet_nl_dashboard/logic/urllist_dashboard_report.py
index 3d5a5f9e..38105ace 100644
--- a/dashboard/internet_nl_dashboard/logic/urllist_dashboard_report.py
+++ b/dashboard/internet_nl_dashboard/logic/urllist_dashboard_report.py
@@ -2,7 +2,7 @@
 import logging
 from copy import deepcopy
 from datetime import datetime, timedelta, timezone
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional
 
 from celery import group
 from deepdiff import DeepDiff
@@ -120,7 +120,8 @@ def rate_urllists_now(urllists: List[UrlList], prevent_duplicates: bool = True,
 
 @app.task(queue='storage')
 def rate_urllist_on_moment(
-        urllist: UrlList, when: datetime = None, prevent_duplicates: bool = True, scan_type: str = "web") -> int:
+        urllist: UrlList, when: Optional[datetime] = None, prevent_duplicates: bool = True,
+        scan_type: str = "web") -> int:
     """
     :param urllist:
     :param when: A moment in time of which data should be aggregated
diff --git a/dashboard/internet_nl_dashboard/views/download_spreadsheet.py b/dashboard/internet_nl_dashboard/views/download_spreadsheet.py
index f4822c2c..927a29a5 100644
--- a/dashboard/internet_nl_dashboard/views/download_spreadsheet.py
+++ b/dashboard/internet_nl_dashboard/views/download_spreadsheet.py
@@ -45,11 +45,11 @@ def create_spreadsheet_download(file_name: str, spreadsheet_data: Any, file_type
 
     if file_type == "xlsx-openpyxl":
         with open(spreadsheet_data.name, 'rb') as file_handle:
-            output = HttpResponse(file_handle.read())
+            output: HttpResponse = HttpResponse(file_handle.read())
         file_type = "xlsx"
     else:
         # Simple xls files and such
-        output: HttpResponse = excel.make_response(spreadsheet_data, file_type)
+        output = excel.make_response(spreadsheet_data, file_type)
 
     output["Content-Disposition"] = f"attachment; filename={slugify(file_name)}.{file_type}"
     output["Content-type"] = content_types[file_type]
diff --git a/dashboard/settings.py b/dashboard/settings.py
index e7e869d8..3f8319ca 100644
--- a/dashboard/settings.py
+++ b/dashboard/settings.py
@@ -684,9 +684,10 @@
 SENTRY_DSN = os.environ.get('SENTRY_DSN')
 if SENTRY_DSN:
     # new sentry_sdk implementation, with hopes to also get exceptions from workers.
-    sentry_sdk.init(dsn=SENTRY_DSN,  # pylint: disable=abstract-class-instantiated  # (following the documentation)
-                    integrations=[CeleryIntegration(), DjangoIntegration(), RedisIntegration()],
-                    release=__version__, send_default_pii=False)
+    sentry_sdk.init(  # pylint: disable=abstract-class-instantiated  # (following the documentation)  # type: ignore
+        dsn=SENTRY_DSN,
+        integrations=[CeleryIntegration(), DjangoIntegration(), RedisIntegration()],
+        release=__version__, send_default_pii=False)
 
 SENTRY_ORGANIZATION = 'internet-cleanup-foundation'
 SENTRY_PROJECT = 'internet-nl-dashboard'
diff --git a/setup.cfg b/setup.cfg
index 8e80fe83..af85266e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -42,7 +42,7 @@ python_version = 3.10
 warn_return_any = True
 warn_unused_configs = True
 plugins = mypy_django_plugin.main
-
+exclude = dashboard/internet_nl_dashboard/tests
 # We're early in trying mypy, therefore 99.99% of python projects do not have stub files.
 # their solution to add #type: ignore after each external import is a bit over the top.
 # https://mypy.readthedocs.io/en/latest/running_mypy.html#missing-imports