diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..698cf56
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,233 @@
+
+# Created by https://www.toptal.com/developers/gitignore/api/python,django,visualstudiocode
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,django,visualstudiocode
+
+### Django ###
+*.log
+*.pot
+*.pyc
+__pycache__/
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+media
+
+# If your build process includes running collectstatic, then you probably don't need or want to include staticfiles/
+# in your Git repository. Update and uncomment the following line accordingly.
+# <django-project-name>/staticfiles/
+
+### Django.Python Stack ###
+# Byte-compiled / optimized / DLL files
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+
+# Django stuff:
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+
+# C extensions
+
+# Distribution / packaging
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+
+# Installer logs
+
+# Unit test / coverage reports
+
+# Translations
+
+# Django stuff:
+
+# Flask stuff:
+
+# Scrapy stuff:
+
+# Sphinx documentation
+
+# PyBuilder
+
+# Jupyter Notebook
+
+# IPython
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+
+# Celery stuff
+
+# SageMath parsed files
+
+# Environments
+
+# Spyder project settings
+
+# Rope project settings
+
+# mkdocs documentation
+
+# mypy
+
+# Pyre type checker
+
+# pytype static type analyzer
+
+# Cython debug symbols
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/python,django,visualstudiocode
\ No newline at end of file
diff --git a/README.md b/README.md
index 06646b5..969fca0 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Usage
 1. `pip install django-block-ip`
 1. Add `block_ip` to your `INSTALLED_APPS`.
 1. Add `block_ip.middleware.BlockIPMiddleware` to your `MIDDLEWARE_CLASSES`.
-1. Run `syncdb`.
+1. Run `python manage.py migrate`.
 1. Add one or more entries to the `BlockIP` list in the admin.
   You can just enter a single IP or use a network mask, like this: 213.67.43.0/24
 
diff --git a/block_ip/middleware.py b/block_ip/middleware.py
index fd73154..b01464f 100644
--- a/block_ip/middleware.py
+++ b/block_ip/middleware.py
@@ -1,6 +1,7 @@
 from django.http import HttpResponseForbidden
 from django.conf import settings
 from django.core.cache import cache
+from django.utils.deprecation import MiddlewareMixin
 
 from .models import BlockIP
 
@@ -16,7 +17,7 @@ def is_ip_in_nets(ip, nets):
     return False
 
 
-class BlockIPMiddleware(object):
+class BlockIPMiddleware(MiddlewareMixin):
     def process_request(self, request):
         is_banned = False
 
@@ -36,6 +37,6 @@ def process_request(self, request):
 
         if is_banned:
             # delete sessions when denied
-            for k in request.session.keys():
+            for k in list(request.session.keys()):
                 del request.session[k]
             return HttpResponseForbidden("")
diff --git a/block_ip/migrations/0001_initial.py b/block_ip/migrations/0001_initial.py
new file mode 100644
index 0000000..a7755f6
--- /dev/null
+++ b/block_ip/migrations/0001_initial.py
@@ -0,0 +1,26 @@
+# Generated by Django 3.2.8 on 2021-10-15 05:19
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='BlockIP',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('network', models.CharField(max_length=18, verbose_name='IP address or mask')),
+                ('reason_for_block', models.TextField(blank=True, help_text='Optional reason for block', null=True)),
+            ],
+            options={
+                'verbose_name': 'IPs & masks to ban',
+                'verbose_name_plural': 'IPs & masks to ban',
+            },
+        ),
+    ]
diff --git a/block_ip/migrations/__init__.py b/block_ip/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/block_ip/models.py b/block_ip/models.py
index 1b27d44..8e18364 100644
--- a/block_ip/models.py
+++ b/block_ip/models.py
@@ -5,7 +5,7 @@
 from django.utils.translation import ugettext_lazy as _
 from django.core.cache import cache
 from django.db.models.signals import post_save, post_delete
-from django.utils.encoding import python_2_unicode_compatible
+from six import python_2_unicode_compatible
 
 
 @python_2_unicode_compatible
diff --git a/setup.py b/setup.py
index ff69799..3e940f4 100644
--- a/setup.py
+++ b/setup.py
@@ -45,6 +45,7 @@ def get_package_data(package):
     package_data=get_package_data('.'),
     install_requires=[
         'ipcalc',
+        'six',
     ],
     classifiers=[
         'Development Status :: 5 - Production/Stable',