diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f05f8732..33ce0cd8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
 # Debian Buster
-# py37-django22:
+#  py37-django22:
 #   stage: test
 #   image: debian:buster-backports
 #   before_script:
@@ -56,7 +56,7 @@ py39-django22:
 
 linters:
   stage: quality-assurance
-  image: debian:buster-backports
+  image: debian:bullseye
   before_script:
     - apt-get update && apt-get install -y tox
   script: tox -e linters
diff --git a/apps/activity/templates/activity/activity_form.html b/apps/activity/templates/activity/activity_form.html
index 757b47b0..8032faae 100644
--- a/apps/activity/templates/activity/activity_form.html
+++ b/apps/activity/templates/activity/activity_form.html
@@ -17,6 +17,9 @@ SPDX-License-Identifier: GPL-3.0-or-later
     </form>
   </div>
 </div>
+{% endblock %}
+
+{% block extrajavascript %}
 <script>
   var date_end = document.getElementById("id_date_end");
   var date_start = document.getElementById("id_date_start");
diff --git a/apps/member/views.py b/apps/member/views.py
index 7c72d3d4..ad0cc79f 100644
--- a/apps/member/views.py
+++ b/apps/member/views.py
@@ -26,7 +26,7 @@ from permission.backends import PermissionBackend
 from permission.models import Role
 from permission.views import ProtectQuerysetMixin, ProtectedCreateView
 
-from .forms import UserForm, ProfileForm, ImageForm, ClubForm, MembershipForm,\
+from .forms import UserForm, ProfileForm, ImageForm, ClubForm, MembershipForm, \
     CustomAuthenticationForm, MembershipRolesForm
 from .models import Club, Membership
 from .tables import ClubTable, UserTable, MembershipTable, ClubManagerTable
diff --git a/apps/note/api/views.py b/apps/note/api/views.py
index 39b9b270..0aba9adc 100644
--- a/apps/note/api/views.py
+++ b/apps/note/api/views.py
@@ -13,7 +13,7 @@ from rest_framework import status
 from api.viewsets import ReadProtectedModelViewSet, ReadOnlyProtectedModelViewSet
 from permission.backends import PermissionBackend
 
-from .serializers import NotePolymorphicSerializer, AliasSerializer, ConsumerSerializer,\
+from .serializers import NotePolymorphicSerializer, AliasSerializer, ConsumerSerializer, \
     TemplateCategorySerializer, TransactionTemplateSerializer, TransactionPolymorphicSerializer, \
     TrustSerializer
 from ..models.notes import Note, Alias, NoteUser, NoteClub, NoteSpecial, Trust
diff --git a/apps/note/tests/test_transactions.py b/apps/note/tests/test_transactions.py
index a11a1962..574e3575 100644
--- a/apps/note/tests/test_transactions.py
+++ b/apps/note/tests/test_transactions.py
@@ -10,7 +10,7 @@ from django.urls import reverse
 from django.utils import timezone
 from permission.models import Role
 
-from ..api.views import AliasViewSet, ConsumerViewSet, NotePolymorphicViewSet, TemplateCategoryViewSet,\
+from ..api.views import AliasViewSet, ConsumerViewSet, NotePolymorphicViewSet, TemplateCategoryViewSet, \
     TransactionTemplateViewSet, TransactionViewSet
 from ..models import NoteUser, Transaction, TemplateCategory, TransactionTemplate, RecurrentTransaction, \
     MembershipTransaction, SpecialTransaction, NoteSpecial, Alias, Note
diff --git a/apps/treasury/api/views.py b/apps/treasury/api/views.py
index c7bf68e6..9b1825d1 100644
--- a/apps/treasury/api/views.py
+++ b/apps/treasury/api/views.py
@@ -5,7 +5,7 @@ from django_filters.rest_framework import DjangoFilterBackend
 from rest_framework.filters import SearchFilter
 from api.viewsets import ReadProtectedModelViewSet
 
-from .serializers import InvoiceSerializer, ProductSerializer, RemittanceTypeSerializer, RemittanceSerializer,\
+from .serializers import InvoiceSerializer, ProductSerializer, RemittanceTypeSerializer, RemittanceSerializer, \
     SogeCreditSerializer
 from ..models import Invoice, Product, RemittanceType, Remittance, SogeCredit
 
diff --git a/apps/treasury/urls.py b/apps/treasury/urls.py
index 2759358f..6e2517b3 100644
--- a/apps/treasury/urls.py
+++ b/apps/treasury/urls.py
@@ -3,8 +3,8 @@
 
 from django.urls import path
 
-from .views import InvoiceCreateView, InvoiceListView, InvoiceUpdateView, InvoiceDeleteView, InvoiceRenderView,\
-    RemittanceListView, RemittanceCreateView, RemittanceUpdateView, LinkTransactionToRemittanceView,\
+from .views import InvoiceCreateView, InvoiceListView, InvoiceUpdateView, InvoiceDeleteView, InvoiceRenderView, \
+    RemittanceListView, RemittanceCreateView, RemittanceUpdateView, LinkTransactionToRemittanceView, \
     UnlinkTransactionToRemittanceView, SogeCreditListView, SogeCreditManageView
 
 app_name = 'treasury'
diff --git a/locale/fr/LC_MESSAGES/django.po b/locale/fr/LC_MESSAGES/django.po
index 46e6aa0a..c6ca48b0 100644
--- a/locale/fr/LC_MESSAGES/django.po
+++ b/locale/fr/LC_MESSAGES/django.po
@@ -3388,6 +3388,10 @@ msgstr "Support technique"
 msgid "FAQ (FR)"
 msgstr "FAQ (FR)"
 
+#: note_kfet/templates/base.html:200
+msgid "Charte Info (FR)"
+msgstr "Charte Info (FR)"
+
 #: note_kfet/templates/base_search.html:15
 msgid "Search by attribute such as name…"
 msgstr "Chercher par un attribut tel que le nom …"
diff --git a/note_kfet/templates/base.html b/note_kfet/templates/base.html
index 979d6e2c..63d0ddfe 100644
--- a/note_kfet/templates/base.html
+++ b/note_kfet/templates/base.html
@@ -194,6 +194,8 @@ SPDX-License-Identifier: GPL-3.0-or-later
                            class="text-muted">{% trans "Contact us" %}</a> &mdash;
                         <a href="mailto:{{ "SUPPORT_EMAIL" | getenv }}"
                            class="text-muted">{% trans "Technical Support" %}</a> &mdash;
+                        <a href="https://perso.crans.org/club-bde/charte_informatique.pdf"
+                           class="text-muted">{% trans "Charte Info (FR)" %}</a> &mdash;
                         <a href="https://note.crans.org/doc/faq/"
                            class="text-muted">{% trans "FAQ (FR)" %}</a> &mdash;
                     </span>