diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 289d0527..decab2c3 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -39,4 +39,4 @@ jobs:
         export $(grep -v '^#' tests/.env | xargs -d '\n')
         cd dashboard_viewer
         python manage.py test --exclude-tag third-party-app
-        #SINGLE_APPLICATION_MODE=n MAIN_APPLICATION_HOST=mainapp.host.com python manage.py test --tag third-party-app
+        SINGLE_APPLICATION_MODE=n MAIN_APPLICATION_HOST=mainapp.host.com python manage.py test --tag third-party-app
diff --git a/.gitignore b/.gitignore
index c3bd3f72..473d416f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+# django local settings
+local_settings.py
+
 # documentation temporary files
 docs/src/_book
 
diff --git a/dashboard_viewer/dashboard_viewer/settings.py b/dashboard_viewer/dashboard_viewer/settings.py
index d1a60a76..c83343c8 100644
--- a/dashboard_viewer/dashboard_viewer/settings.py
+++ b/dashboard_viewer/dashboard_viewer/settings.py
@@ -320,6 +320,16 @@ def constance_updated(key, old_value, **_):
 TEST_RUNNER = "dashboard_viewer.runners.CeleryTestSuiteRunner"
 
 
+# required since django 3.2
+DEFAULT_AUTO_FIELD = "django.db.models.AutoField"
+
+
+try:
+    import local_settings  # noqa
+    from local_settings import *  # noqa
+except ImportError:
+    pass
+
 # Variables that allow restricting the access to the uploader app if this Django
 #  app is being used as a third-party tool and is being iframed.
 SINGLE_APPLICATION_MODE = strtobool(os.environ.get("SINGLE_APPLICATION_MODE", "y")) == 1
@@ -337,7 +347,7 @@ def constance_updated(key, old_value, **_):
             "Only include the hostname part of the URL."
         )
 
-    X_FRAME_OPTIONS = f"ALLOW-FROM https://{MAIN_APPLICATION_HOST}/"
-
-# required since django 3.2
-DEFAULT_AUTO_FIELD = "django.db.models.AutoField"
+    if (
+        len(ALLOWED_HOSTS) > 1 or ALLOWED_HOSTS[0] != "*"
+    ) and MAIN_APPLICATION_HOST not in ALLOWED_HOSTS:
+        ALLOWED_HOSTS.append(MAIN_APPLICATION_HOST)
diff --git a/dashboard_viewer/materialized_queries_manager/management/commands/refresh_mat_views.py b/dashboard_viewer/materialized_queries_manager/management/commands/refresh_mat_views.py
index 53ca5148..c3b497a6 100644
--- a/dashboard_viewer/materialized_queries_manager/management/commands/refresh_mat_views.py
+++ b/dashboard_viewer/materialized_queries_manager/management/commands/refresh_mat_views.py
@@ -2,6 +2,7 @@
 
 from django.core.cache import cache
 from django.core.management.base import BaseCommand
+
 from materialized_queries_manager.utils import refresh
 
 logger = logging.getLogger(__name__)
diff --git a/dashboard_viewer/materialized_queries_manager/tasks.py b/dashboard_viewer/materialized_queries_manager/tasks.py
index a8f5e937..aed85222 100644
--- a/dashboard_viewer/materialized_queries_manager/tasks.py
+++ b/dashboard_viewer/materialized_queries_manager/tasks.py
@@ -9,6 +9,7 @@
 from django.core import serializers
 from django.core.cache import cache
 from django.db import connections, ProgrammingError, router, transaction
+
 from materialized_queries_manager.models import MaterializedQuery
 from materialized_queries_manager.utils import refresh
 
diff --git a/dashboard_viewer/materialized_queries_manager/utils.py b/dashboard_viewer/materialized_queries_manager/utils.py
index c8509d12..857ea4e7 100644
--- a/dashboard_viewer/materialized_queries_manager/utils.py
+++ b/dashboard_viewer/materialized_queries_manager/utils.py
@@ -1,8 +1,9 @@
 from django.core.cache import cache
 from django.db import connections
-from materialized_queries_manager.models import MaterializedQuery
 from redis_rw_lock import RWLock
 
+from materialized_queries_manager.models import MaterializedQuery
+
 
 def refresh(logger, db_id=None, query_set=None):
     # Only one worker can update the materialized views at the same time -> same as -> only one thread
diff --git a/dashboard_viewer/uploader/decorators.py b/dashboard_viewer/uploader/decorators.py
index bbdf95f8..76daa74c 100644
--- a/dashboard_viewer/uploader/decorators.py
+++ b/dashboard_viewer/uploader/decorators.py
@@ -2,7 +2,7 @@
 
 from django.conf import settings
 from django.http import HttpResponseForbidden
-from django.views.decorators.csrf import csrf_exempt
+from django.views.decorators.clickjacking import xframe_options_exempt
 
 
 def uploader_decorator(view_func):
@@ -12,14 +12,14 @@ def uploader_decorator(view_func):
       If not response with 403
     Else don't do any verification
     """
-    wrapped_view = csrf_exempt(view_func)
     if not settings.SINGLE_APPLICATION_MODE:
+        wrapped_view = xframe_options_exempt(view_func)
 
         def check_host(request, *args, **kwargs):
             if request.get_host() != settings.MAIN_APPLICATION_HOST:
                 return HttpResponseForbidden()
             return view_func(request, *args, **kwargs)
 
-        wrapped_view = wraps(wrapped_view)(check_host)
+        return wraps(wrapped_view)(check_host)
 
-    return wrapped_view
+    return view_func
diff --git a/dashboard_viewer/uploader/file_handler/updates.py b/dashboard_viewer/uploader/file_handler/updates.py
index df0ed447..d14ba639 100644
--- a/dashboard_viewer/uploader/file_handler/updates.py
+++ b/dashboard_viewer/uploader/file_handler/updates.py
@@ -2,6 +2,7 @@
 from django.conf import settings
 from django.db import connections
 from sqlalchemy import create_engine
+
 from uploader.models import (
     AchillesResults,
     AchillesResultsArchive,
diff --git a/dashboard_viewer/uploader/tasks.py b/dashboard_viewer/uploader/tasks.py
index 87e5dd6a..8e8e898f 100644
--- a/dashboard_viewer/uploader/tasks.py
+++ b/dashboard_viewer/uploader/tasks.py
@@ -3,9 +3,9 @@
 from django.core import serializers
 from django.core.cache import cache
 from django.db import router, transaction
-from materialized_queries_manager.utils import refresh
 from redis_rw_lock import RWLock
 
+from materialized_queries_manager.utils import refresh
 from .file_handler.checks import extract_data_from_uploaded_file
 from .file_handler.updates import update_achilles_results_data
 from .models import AchillesResults, PendingUpload, UploadHistory
diff --git a/dashboard_viewer/uploader/tests.py b/dashboard_viewer/uploader/tests.py
index d4bf83ba..ebf3a9c6 100644
--- a/dashboard_viewer/uploader/tests.py
+++ b/dashboard_viewer/uploader/tests.py
@@ -46,19 +46,11 @@ def test_not_block_if_correct_host(self):
         response = self.client.get("/uploader/test/", HTTP_HOST="mainapp.host.com")
 
         self.assertEqual(200, response.status_code)
-        self.assertTrue(response.has_header("X-Frame-Options"))
-        self.assertEqual(
-            "ALLOW-FROM HTTPS://MAINAPP.HOST.COM/", response["X-Frame-Options"]
-        )
 
     def test_not_block_other_urls(self):
         response = self.client.get("/admin/login/", HTTP_HOST="thisapp.host.com")
 
         self.assertEqual(200, response.status_code)
-        self.assertTrue(response.has_header("X-Frame-Options"))
-        self.assertEqual(
-            "ALLOW-FROM HTTPS://MAINAPP.HOST.COM/", response["X-Frame-Options"]
-        )
 
 
 class UploaderNonRestrictedAccess(TestCase):
@@ -74,8 +66,6 @@ def test_not_block_if_single_application(self):
         response = self.client.get("/uploader/test/", HTTP_HOST="some.domain.com")
 
         self.assertEqual(200, response.status_code)
-        if response.has_header("X-Frame-Options"):
-            self.assertNotIn("ALLOW-FROM ", response.get("X-Frame-Options"))
 
 
 class DataSourceCreator:
diff --git a/dashboard_viewer/uploader/views.py b/dashboard_viewer/uploader/views.py
index 78ea20f3..2e478c6c 100644
--- a/dashboard_viewer/uploader/views.py
+++ b/dashboard_viewer/uploader/views.py
@@ -6,12 +6,11 @@
 from django.http import JsonResponse
 from django.shortcuts import get_object_or_404, redirect, render
 from django.utils.html import format_html, mark_safe
-from django.views.decorators.clickjacking import xframe_options_exempt
 from rest_framework.response import Response
 from rest_framework.viewsets import GenericViewSet
 
-from materialized_queries_manager.tasks import refresh_materialized_views_task
 from materialized_queries_manager.models import MaterializedQuery
+from materialized_queries_manager.tasks import refresh_materialized_views_task
 from .decorators import uploader_decorator
 from .forms import AchillesResultsForm, EditSourceForm, SourceForm
 from .models import Country, DataSource, PendingUpload, UploadHistory
@@ -22,7 +21,6 @@
 
 
 @uploader_decorator
-@xframe_options_exempt
 def upload_achilles_results(request, *args, **kwargs):
     data_source = kwargs.get("data_source")
     try:
@@ -157,7 +155,6 @@ def _leave_valid_fields_values_only(request, initial, aux_form):
 
 
 @uploader_decorator
-@xframe_options_exempt
 def create_data_source(request, *_, **kwargs):
     data_source = kwargs.get("data_source")
     if request.method == "GET":
@@ -239,7 +236,6 @@ def create_data_source(request, *_, **kwargs):
 
 
 @uploader_decorator
-@xframe_options_exempt
 def edit_data_source(request, *_, **kwargs):
     data_source = kwargs.get("data_source")
     try:
@@ -307,7 +303,9 @@ def partial_update(self, request, *_, **__):
         serializer.is_valid(raise_exception=True)
         serializer.save()
 
-        refresh_materialized_views_task.delay([obj.matviewname for obj in MaterializedQuery.objects.all()])
+        refresh_materialized_views_task.delay(
+            [obj.matviewname for obj in MaterializedQuery.objects.all()]
+        )
 
         if getattr(instance, "_prefetched_objects_cache", None):
             # If 'prefetch_related' has been applied to a queryset, we need to
diff --git a/setup.cfg b/setup.cfg
index 76553c53..968a67c6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,5 +2,8 @@
 combine_as_imports = true
 include_trailing_comma = true
 known_third_party = bootstrap_datepicker_plus,celery,django,model_utils,rest_framework,uploader
+known_first_party = dashboard_viewer,materialized_queries_manager,tabsManager,uploader
+no_lines_before = LOCALFOLDER
 multi_line_output = 3
 order_by_type = false
+extend_skip = migrations