diff --git a/pyproject.toml b/pyproject.toml
index 2f40bf6..69abb26 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,47 +4,43 @@ version = '0.4.0'
 description = 'Simple shift management system'
 readme = 'README.md'
 requires-python = '>=3.9'
-authors = [
-    { name = 'HaDiKo e.V. HaDiNet', email = 'software@hadiko.de' },
-]
+authors = [{ name = 'HaDiKo e. V. - HaDiNet', email = 'software@hadiko.de' }]
 classifiers = [
-    'Programming Language :: Python',
-    'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3 :: Only',
-    'Programming Language :: Python :: 3.9',
-    'Programming Language :: Python :: 3.10',
-    'Programming Language :: Python :: 3.11',
+  'Programming Language :: Python',
+  'Programming Language :: Python :: 3',
+  'Programming Language :: Python :: 3 :: Only',
+  'Programming Language :: Python :: 3.9',
+  'Programming Language :: Python :: 3.10',
+  'Programming Language :: Python :: 3.11',
 ]
 
 dependencies = [
-    'Authlib==1.3.0',
-    'Django==4.2.9',
-    'django-auth-ldap==4.6.0',
-    'django-bootstrap5==23.4',
-    'django-colorfield==0.11.0',
-    'django-ical==1.9.2',
-    'django-phonenumber-field[phonenumberslite]==7.3.0',
-    'gunicorn==21.2.0',
-    'holidays==0.40',
-    'icalendar==5.0.11',
-    'Pillow==10.4.0',
-    'psycopg2-binary==2.9.10',
-    'python-dateutil==2.8.2',
-    'requests==2.31.0',
+  'Authlib==1.4.1',
+  'Django==5.2.3',
+  'django-auth-ldap==5.2.0',
+  'django-bootstrap5==25.1',
+  'django-colorfield==0.14.0',
+  'django-ical==1.9.2',
+  'django-phonenumber-field[phonenumberslite]==8.1.0',
+  'gunicorn==23.0.0',
+  'holidays==0.75',
+  'icalendar==6.3.1',
+  'Pillow==11.2.1',
+  'psycopg2-binary==2.9.10',
+  'python-dateutil==2.9.0.post0',
+  'requests==2.32.4',
 ]
 
 [project.optional-dependencies]
 tests = [
-    'django-stubs==4.2.7',
-    'types-python-dateutil==2.8.19.14',
-    'types-requests==2.31.0.10',
-    'mypy==1.8.0',
-]
-docs = [
-    'mkdocs==1.4.2',
-    'mkdocs-material==9.0.11',
+  'django-stubs==4.2.7',
+  'types-python-dateutil==2.8.19.14',
+  'types-requests==2.31.0.10',
+  'mypy==1.8.0',
 ]
 
+docs = ['mkdocs==1.4.2', 'mkdocs-material==9.0.11']
+
 [project.urls]
 repository = 'https://github.com/HaDiNet/shiftings'
 
diff --git a/src/shiftings/events/models/event.py b/src/shiftings/events/models/event.py
index c506288..e5c5ca8 100644
--- a/src/shiftings/events/models/event.py
+++ b/src/shiftings/events/models/event.py
@@ -44,7 +44,7 @@ class Meta:
         ordering = ['name', 'start_date', 'end_date', 'organization']
         constraints = [
             models.CheckConstraint(name='event_start_after_end',
-                                   check=models.Q(start_date__lte=models.F('end_date')))
+                                   condition=models.Q(start_date__lte=models.F('end_date')))
         ]
 
     def __str__(self) -> str:
diff --git a/src/shiftings/organizations/models/membership.py b/src/shiftings/organizations/models/membership.py
index fc523e2..f843813 100644
--- a/src/shiftings/organizations/models/membership.py
+++ b/src/shiftings/organizations/models/membership.py
@@ -42,9 +42,9 @@ class Meta:
             UniqueConstraint(fields=['organization', 'name'], name='name_unique_per_organization'),
             UniqueConstraint(fields=['organization', 'admin'], name='admin_unique_per_organization'),
             UniqueConstraint(fields=['organization', 'default'], name='default_unique_per_organization'),
-            CheckConstraint(check=~Q(admin=False), name='admin_true_or_null'),
-            CheckConstraint(check=~Q(default=False), name='default_true_or_null'),
-            CheckConstraint(check=(Q(admin=True, default__isnull=True) | Q(admin__isnull=True)),
+            CheckConstraint(condition=~Q(admin=False), name='admin_true_or_null'),
+            CheckConstraint(condition=~Q(default=False), name='default_true_or_null'),
+            CheckConstraint(condition=(Q(admin=True, default__isnull=True) | Q(admin__isnull=True)),
                             name='admin_not_default')
         ]
 
@@ -76,7 +76,7 @@ class Meta:
             UniqueConstraint(fields=['organization', 'type', 'user'], name='unique_membership_organization_type_user'),
             UniqueConstraint(fields=['organization', 'type', 'group'],
                              name='unique_membership_organization_type_group'),
-            CheckConstraint(check=(~(Q(user__isnull=True) & Q(group__isnull=True))), name='group_or_user')
+            CheckConstraint(condition=(~(Q(user__isnull=True) & Q(group__isnull=True))), name='group_or_user')
         ]
 
     def __str__(self) -> str:
diff --git a/src/shiftings/shifts/models/base.py b/src/shiftings/shifts/models/base.py
index 7d064af..b99bd70 100644
--- a/src/shiftings/shifts/models/base.py
+++ b/src/shiftings/shifts/models/base.py
@@ -27,6 +27,6 @@ class Meta:
         abstract = True
         default_permissions = ()
         constraints = [
-            models.CheckConstraint(check=Q(max_users=0) | Q(max_users__gte=F('required_users')),
+            models.CheckConstraint(condition=Q(max_users=0) | Q(max_users__gte=F('required_users')),
                                    name='shift_max_users_gte_required_users')
         ]
diff --git a/src/shiftings/shifts/models/shift.py b/src/shiftings/shifts/models/shift.py
index 1157b7e..d9aabd3 100644
--- a/src/shiftings/shifts/models/shift.py
+++ b/src/shiftings/shifts/models/shift.py
@@ -46,7 +46,7 @@ class Meta:
         default_permissions = ()
         ordering = ['start', 'end', 'name', 'organization']
         constraints = [
-            models.CheckConstraint(check=Q(start__lte=F('end')), name='shift_start_before_end')
+            models.CheckConstraint(condition=Q(start__lte=F('end')), name='shift_start_before_end')
         ]
 
     def clean(self) -> None: