diff --git a/allianceauth/custom_css/admin.py b/allianceauth/custom_css/admin.py
index debc4f16..093e18e8 100644
--- a/allianceauth/custom_css/admin.py
+++ b/allianceauth/custom_css/admin.py
@@ -2,16 +2,16 @@
 Admin classes for custom_css app
 """
 
+# Django
+from django.contrib import admin
+
+# Django Solos
+from solo.admin import SingletonModelAdmin
+
 # Alliance Auth Custom CSS
 from allianceauth.custom_css.models import CustomCSS
 from allianceauth.custom_css.forms import CustomCSSAdminForm
 
-# Alliance Auth Framework
-from allianceauth.framework.admin import SingletonModelAdmin
-
-# Django
-from django.contrib import admin
-
 
 @admin.register(CustomCSS)
 class CustomCSSAdmin(SingletonModelAdmin):
diff --git a/allianceauth/custom_css/models.py b/allianceauth/custom_css/models.py
index d3c3cebd..c831cf6b 100644
--- a/allianceauth/custom_css/models.py
+++ b/allianceauth/custom_css/models.py
@@ -2,13 +2,11 @@
 Models for the custom_css app
 """
 
-import hashlib
 import os
 import re
-import sys
 
-# Alliance Auth Framework
-from allianceauth.framework.models import SingletonModel
+# Django Solo
+from solo.models import SingletonModel
 
 # Django
 from django.conf import settings
@@ -62,7 +60,7 @@ class CustomCSS(SingletonModel):
 
         self.pk = 1
 
-        if len(self.css.replace(" ", "")) > 0:
+        if self.css and len(self.css.replace(" ", "")) > 0:
             # Write the custom CSS to a file
             custom_css_file = open(
                 f"{settings.STATIC_ROOT}allianceauth/custom-styles.css", "w+"
diff --git a/allianceauth/framework/admin.py b/allianceauth/framework/admin.py
deleted file mode 100644
index 8fb8e678..00000000
--- a/allianceauth/framework/admin.py
+++ /dev/null
@@ -1,58 +0,0 @@
-"""
-Admin classes for the framework app
-"""
-
-from django.contrib import admin
-
-
-class SingletonModelAdmin(admin.ModelAdmin):
-    """
-    Singleton Model Admin
-    Prevents Django admin users deleting the singleton or adding extra rows.
-    """
-
-    actions = None  # Removes the default delete action.
-
-    def has_add_permission(self, request):  # pylint: disable=unused-argument
-        """
-        Has "add" permissions
-
-        :param request:
-        :type request:
-        :return:
-        :rtype:
-        """
-
-        return self.model.objects.all().count() == 0
-
-    def has_change_permission(
-        self, request, obj=None  # pylint: disable=unused-argument
-    ):
-        """
-        Has "change" permissions
-
-        :param request:
-        :type request:
-        :param obj:
-        :type obj:
-        :return:
-        :rtype:
-        """
-
-        return True
-
-    def has_delete_permission(
-        self, request, obj=None  # pylint: disable=unused-argument
-    ):
-        """
-        Has "delete" permissions
-
-        :param request:
-        :type request:
-        :param obj:
-        :type obj:
-        :return:
-        :rtype:
-        """
-
-        return False
diff --git a/allianceauth/framework/models.py b/allianceauth/framework/models.py
deleted file mode 100644
index 071de410..00000000
--- a/allianceauth/framework/models.py
+++ /dev/null
@@ -1,47 +0,0 @@
-"""
-AA framework models
-"""
-
-from django.db import models
-
-
-class SingletonModel(models.Model):
-    """
-    SingletonModel
-    """
-
-    class Meta:  # pylint: disable=too-few-public-methods
-        """
-        Model meta definitions
-        """
-
-        abstract = True
-
-    def save(self, *args, **kwargs):
-        """
-        "Save" action
-
-        :param args:
-        :type args:
-        :param kwargs:
-        :type kwargs:
-        :return:
-        :rtype:
-        """
-
-        self.pk = 1
-        super().save(*args, **kwargs)
-
-    def delete(self, *args, **kwargs):
-        """
-        "Delete" action
-
-        :param args:
-        :type args:
-        :param kwargs:
-        :type kwargs:
-        :return:
-        :rtype:
-        """
-
-        pass  # pylint: disable=unnecessary-pass
diff --git a/allianceauth/project_template/project_name/settings/base.py b/allianceauth/project_template/project_name/settings/base.py
index 14469132..cf26fe4a 100644
--- a/allianceauth/project_template/project_name/settings/base.py
+++ b/allianceauth/project_template/project_name/settings/base.py
@@ -22,6 +22,7 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
     'django.contrib.humanize',
     'django_celery_beat',
+    'solo',
     'bootstrapform',
     'django_bootstrap5',  # https://github.com/zostera/django-bootstrap5
     'sortedm2m',
diff --git a/pyproject.toml b/pyproject.toml
index a2568a40..35edbe64 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,7 @@ dependencies = [
     "django-esi>=5",
     "django-redis>=5.2",
     "django-registration<3.4,>=3.3",
+    "django-solo",
     "django-sortedm2m",
     "dnspython",
     "mysqlclient>=2.1",