diff --git a/.gitignore b/.gitignore
index 3bbe7b6..af2f537 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,104 @@
+# Byte-compiled / optimized / DLL files
 __pycache__/
-*.pyc
-*.pyo
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+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/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+.static_storage/
+.media/
+local_settings.py
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+
+# celery beat schedule file
+celerybeat-schedule
+
+# 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/
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..9492abb
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,8 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+Initial release
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..15ff479
--- /dev/null
+++ b/README.md
@@ -0,0 +1,17 @@
+# mmcli
+
+
+
+## Development
+To create a virtualenv and install the dependencies in it:
+```
+tools/create_venv.sh
+```
+
+Activate the virtualenv with `source venv/bin/activate`. To make this easier, you could create
+an [alias][] `alias venv='source venv/bin/activate'` in your shell.
+
+[alias]: https://www.computerworld.com/article/2598087/how-to-use-aliases-in-linux-shell-commands.html
+
+If you introduce dependencies, list them in `pyproject.toml` under `dependencies`, and run
+`tools/update_requirements.sh`.
diff --git a/mmcli/__init__.py b/mmcli/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/mmcli.py b/mmcli/mmcli.py
similarity index 99%
rename from mmcli.py
rename to mmcli/mmcli.py
index 39e5890..e878942 100755
--- a/mmcli.py
+++ b/mmcli/mmcli.py
@@ -9,9 +9,9 @@ import re
 from time import sleep
 import threading
 import mattermost
-from parsedt import parse_datetime_to_utc
+from .parsedt import parse_datetime_to_utc
 
-from mmws import MMws
+from .mmws import MMws
 
 
 class NotFound(Exception):
diff --git a/mmws.py b/mmcli/mmws.py
similarity index 100%
rename from mmws.py
rename to mmcli/mmws.py
diff --git a/parsedt.py b/mmcli/parsedt.py
similarity index 100%
rename from parsedt.py
rename to mmcli/parsedt.py
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..028c55b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,51 @@
+[project]
+name = "mmcli"
+version = "0.0.1"
+authors = [
+	{ name="Midgard", email="midgard@zeus.ugent.be" },
+]
+description = "Mattermost command-line interface"
+readme = "README.md"
+
+# Choose from the list at https://pypi.org/classifiers/
+classifiers = [
+	"Programming Language :: Python :: 3",
+	"License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+	"Operating System :: OS Independent",
+	"Natural Language :: English",
+	"Environment :: Console",
+
+	#"Development Status :: 1 - Planning",
+	#"Development Status :: 2 - Pre-Alpha",
+	"Development Status :: 3 - Alpha",
+	#"Development Status :: 4 - Beta",
+	#"Development Status :: 5 - Production/Stable",
+	#"Development Status :: 6 - Mature",
+	#"Development Status :: 7 - Inactive",
+
+	"Intended Audience :: End Users/Desktop",
+	"Topic :: Utilities",
+]
+
+requires-python = ">=3.7"
+dependencies = [
+	"python-dateutil >= 2.8.2, < 3.0.0",
+	"mattermost >= 5.33.0",
+]
+
+[project.urls]
+#"Homepage" = ""
+"Source" = "https://git.zeus.gent/midgard/mmcli"
+"Change log" = "https://git.zeus.gent/midgard/mmcli/-/blob/master/CHANGELOG.md"
+"Bug tracker" = "https://git.zeus.gent/midgard/mmcli/-/issues"
+
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project.scripts]
+# executable-name = "package.subpackage.module:function"
+mmcli = "mmcli.mmcli:main"
+
+[tool.setuptools.packages]
+find = {}
diff --git a/tools/clean.sh b/tools/clean.sh
new file mode 100755
index 0000000..da12cd0
--- /dev/null
+++ b/tools/clean.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd "`dirname "$0"`"/..
+rm -rf ./build/ ./*.egg-info/ ./dist/ ./__pycache__/ ./*/__pycache__/
diff --git a/tools/create_venv.sh b/tools/create_venv.sh
new file mode 100755
index 0000000..adb947b
--- /dev/null
+++ b/tools/create_venv.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+cd "`dirname "$0"`"/..
+
+# Create virtualenv
+python3 -m virtualenv venv/
+# Install dependencies
+venv/bin/pip install -e .
diff --git a/tools/release.sh b/tools/release.sh
new file mode 100755
index 0000000..1c1469a
--- /dev/null
+++ b/tools/release.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+set -e
+
+cd $(dirname "$0")/..
+
+tools/test.sh
+
+if [ ! -t 0 ] ; then
+	echo "release.sh should be run with a terminal attached to stdin" >&2
+	exit 1
+fi
+
+git status
+
+echo -n "Previous version:  v"
+prev_version="$(python -c 'print(__import__("tomllib").load(open("pyproject.toml", "rb"))["project"]["version"])')"
+echo "$prev_version"
+read -p "Enter new version: v" version
+
+tagid=v"$version"
+if [ "$version" != "$prev_version" ]; then
+	sed -i 's/version = ".*"/version = "'"$version"'"/q' pyproject.toml
+	sed -i 's/## \[Unreleased\]/&\n### Added\n### Changed\n### Deprecated\n### Removed\n### Fixed\n### Security\n\n## ['"$version"'] - '"$(date --utc +%Y-%m-%d)"'/' CHANGELOG.md
+	echo; echo "Inspect CHANGELOG..."
+	${EDITOR:-nano} CHANGELOG.md
+	git add pyproject.toml CHANGELOG.md
+	git commit -m "Bump version to $version"
+
+	echo "Creating git tag $tagid"
+	git tag -s -m "Version $version" "$tagid"
+else
+	echo "Version already created; building wheel and uploading"
+fi
+
+venv/bin/pip install --upgrade build
+venv/bin/python -m build
+
+read -p "Upload to Git and PyPI? (y/N) " confirm
+if [ ! "$confirm" = y ]; then "Abort"; exit 1; fi
+
+python3 -m twine upload dist/*-${version}*
+git push origin "$tagid" master
diff --git a/tools/update_requirements.sh b/tools/update_requirements.sh
new file mode 100755
index 0000000..8e4e3fe
--- /dev/null
+++ b/tools/update_requirements.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+
+cd "`dirname "$0"`"/..
+
+if [ ! -f venv/bin/pip-compile ]; then
+	venv/bin/pip install pip-tools
+fi
+
+cat <<EOF > requirements.txt
+#
+# This file is autogenerated. To update, run:
+#    tools/update_requirements.sh
+#
+EOF
+venv/bin/pip-compile --quiet --generate-hashes --annotate --no-header --output-file="-" >> requirements.txt
+echo "Updated requirements.txt"