diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 97110ecd..98fbac88 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,21 +7,6 @@ stages:
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
-# Debian Buster
-py37-django22:
-  stage: test
-  image: debian:buster-backports
-  before_script:
-    - >
-        apt-get update &&
-        apt-get install --no-install-recommends -t buster-backports -y
-        python3-django python3-django-crispy-forms
-        python3-django-extensions python3-django-filters python3-django-polymorphic
-        python3-djangorestframework python3-django-oauth-toolkit python3-psycopg2 python3-pil
-        python3-babel python3-lockfile python3-pip python3-phonenumbers python3-memcache
-        python3-bs4 python3-setuptools tox texlive-xetex
-  script: tox -e py37-django22
-
 # Ubuntu 20.04
 py38-django22:
   stage: test
@@ -54,9 +39,26 @@ py39-django22:
         python3-bs4 python3-setuptools tox texlive-xetex
   script: tox -e py39-django22
 
+# Debian Bookworm
+py311-django42:
+  stage: test
+  image: debian:bookworm
+  before_script:
+    - >
+        apt-get update &&
+        apt-get install --no-install-recommends -y
+        python3-django python3-django-crispy-forms
+        python3-django-extensions python3-django-filters python3-django-polymorphic
+        python3-djangorestframework python3-django-oauth-toolkit python3-psycopg2 python3-pil
+        python3-babel python3-lockfile python3-pip python3-phonenumbers python3-memcache
+        python3-bs4 python3-setuptools tox texlive-xetex
+  script: tox -e py311-django42
+
+
+
 linters:
   stage: quality-assurance
-  image: debian:buster-backports
+  image: debian:bookworm
   before_script:
     - apt-get update && apt-get install -y tox
   script: tox -e linters
diff --git a/apps/note/templates/note/amount_input.html b/apps/note/templates/note/amount_input.html
index d4873115..cbe9d160 100644
--- a/apps/note/templates/note/amount_input.html
+++ b/apps/note/templates/note/amount_input.html
@@ -9,7 +9,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
            name="{{ widget.name }}"
            {# Other attributes are loaded  #}
            {% for name, value in widget.attrs.items %}
-                {% ifnotequal value False %}{{ name }}{% ifnotequal value True %}="{{ value|stringformat:'s' }}"{% endifnotequal %}{% endifnotequal %}
+                {% if value is not False %}{{ name }}{% if value is not True %}="{{ value|stringformat:'s' }}"{% endif %}{% endif %}
             {% endfor %}>
     <div class="input-group-append">
         <span class="input-group-text">€</span>
diff --git a/note_kfet/templates/autocomplete_model.html b/note_kfet/templates/autocomplete_model.html
index fa24213f..5ffe971d 100644
--- a/note_kfet/templates/autocomplete_model.html
+++ b/note_kfet/templates/autocomplete_model.html
@@ -8,7 +8,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
    {% if widget.value != None and widget.value != "" %}value="{{ widget.value }}"{% endif %}
    name="{{ widget.name }}_name" autocomplete="off"
     {% for name, value in widget.attrs.items %}
-        {% ifnotequal value False %}{{ name }}{% ifnotequal value True %}="{{ value|stringformat:'s' }}"{% endifnotequal %}{% endifnotequal %}
+        {% if value is not False %}{{ name }}{% if value is not True %}="{{ value|stringformat:'s' }}"{% endif %}{% endif %}
     {% endfor %}
     aria-describedby="{{widget.attrs.id}}_tooltip">
     {% if widget.resetable %}
diff --git a/requirements.txt b/requirements.txt
index f4ece220..5548fd4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,19 +1,19 @@
-beautifulsoup4~=4.7.1
-Django~=2.2.15
-django-bootstrap-datepicker-plus~=3.0.5
-django-cas-server~=1.2.0
-django-colorfield~=0.3.2
-django-crispy-forms~=1.7.2
-django-extensions>=2.1.4
-django-filter~=2.1
-django-htcpcp-tea~=0.3.1
-django-mailer~=2.0.1
-django-oauth-toolkit~=1.3.3
-django-phonenumber-field~=5.0.0
-django-polymorphic>=2.0.3,<3.0.0
-djangorestframework>=3.9.0,<3.13.0
-django-rest-polymorphic~=0.1.9
-django-tables2~=2.3.1
-python-memcached~=1.59
-phonenumbers~=8.9.10
-Pillow>=5.4.1
+beautifulsoup4~=4.12.3
+Django~=4.2.9
+django-bootstrap-datepicker-plus~=5.0.5
+django-cas-server~=2.0.0
+django-colorfield~=0.11.0
+django-crispy-forms~=2.1.0
+django-extensions>=3.2.3
+django-filter~=23.5
+django-htcpcp-tea~=0.8.1
+django-mailer~=2.3.1
+django-oauth-toolkit~=2.3.0
+django-phonenumber-field~=7.3.0
+django-polymorphic~=3.1.0
+djangorestframework~=3.14.0
+django-rest-polymorphic~=0.1.10
+django-tables2~=2.7.0
+python-memcached~=1.62
+phonenumbers~=8.13.28
+Pillow>=10.2.0
diff --git a/tox.ini b/tox.ini
index ad3c6798..0526236f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,14 +1,14 @@
 [tox]
 envlist =
-    # Debian Buster Python
-    py37-django22
-
     # Ubuntu 20.04 Python
     py38-django22
 
     # Debian Bullseye Python
     py39-django22
 
+    # Debian Bookworm Python
+    py311-django42
+
     linters
 skipsdist = True