diff --git a/.github/workflows/language-tags.yaml b/.github/workflows/language-tags.yaml
new file mode 100644
index 0000000..f26da6d
--- /dev/null
+++ b/.github/workflows/language-tags.yaml
@@ -0,0 +1,38 @@
+name: language-tags backend tests
+on:
+  push:
+    paths:
+      - language-tags/**
+      - tests/**
+      - language-tags.yaml
+      - pyproject.toml
+      - requirements*.txt
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ "3.10", "3.11", "3.12" ]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+      # You can test your matrix by printing the current Python version
+      - name: Display Python version
+        run: python -c "import sys; print(sys.version)"
+
+      - name: Install python requirements
+        env:
+          HATCH_BUILD_NO_HOOKS: true
+        working-directory: ./
+        run: |
+          pip --version
+          pip install pip-tools
+          pip-sync requirements-dev.txt
+          pip install -e .
+
+      - name: Python tests
+        run: pytest tests --exitfirst --capture=no -vvv --full-trace
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 5210b02..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-dist: focal
-language: python
-python:
- - 3.8
- - 3.9
- - 3.10
-install:
- - pip install pytest coveralls pytest-cov
- - python setup.py develop
-script: 
-    py.test --cov language_tags --cov-report term-missing tests
-after_success:
-    coveralls
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 63392a3..8826e3f 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # language_tags documentation build configuration file, created by
 # sphinx-quickstart on Mon Sep  8 10:24:40 2014.
diff --git a/language_tags/Subtag.py b/language_tags/Subtag.py
index d39e613..d755cbd 100644
--- a/language_tags/Subtag.py
+++ b/language_tags/Subtag.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import json
 from language_tags import data
 
diff --git a/language_tags/Tag.py b/language_tags/Tag.py
index 09c3d44..20e8e99 100644
--- a/language_tags/Tag.py
+++ b/language_tags/Tag.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import json
 
 
diff --git a/language_tags/tags.py b/language_tags/tags.py
index afeafca..4f3a217 100644
--- a/language_tags/tags.py
+++ b/language_tags/tags.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from language_tags.Subtag import Subtag
 from language_tags.Tag import Tag
 from language_tags import data
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..9ca3c2d
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,60 @@
+[build-system]
+requires = ["hatchling", "hatch-fancy-pypi-readme"]
+build-backend = "hatchling.build"
+
+[project]
+version = "1.2.0"
+name = "language-tags"
+dynamic = ["readme"]
+authors = [
+    { name = "Flanders Heritage Agency", email = "ict@onroerenderfgoed.be" },
+]
+license = "MIT"
+description = "This project is a Python version of the language-tags Javascript project."
+requires-python = ">=3.10,<3.13"
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Programming Language :: Python",
+    "Framework :: Pyramid",
+    "Topic :: Internet :: WWW/HTTP",
+    "Topic :: Internet :: WWW/HTTP :: WSGI :: Application",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+]
+dependencies = [
+]
+
+[project.urls]
+History = "https://github.com/OnroerendErfgoed/language-tags/blob/master/HISTORY.rst"
+Tracker = "https://github.com/OnroerendErfgoed/language-tags/issues"
+Source = "https://github.com/OnroerendErfgoed/language-tags"
+Documentation = "https://language-tags.readthedocs.io/en/latest/"
+
+[project.optional-dependencies]
+dev = [
+    "uv==0.4.1",
+    "sphinx==6.1.2",
+    "pytest==8.3.3",
+    "pytest-cov==5.0.0",
+]
+
+##
+# Build tool specific
+##
+[tool.hatch.build.targets.wheel]
+# In the wheel we want to have language-tags in the root as python module.
+only-include = [
+    "/language-tags",
+]
+
+[tool.hatch.metadata]
+# This allows us to use github links as dependencies
+allow-direct-references = true
+
+[tool.hatch.metadata.hooks.fancy-pypi-readme]
+content-type = "text/x-rst"
+fragments = [
+  { path = "README.rst" },
+  { path = "HISTORY.rst" },
+]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 977dcdf..72e56cd 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,9 +1,58 @@
-# Runtime requirements
---requirement requirements.txt
-
-# Testing
-pytest==7.2.0
-pytest-cov==4.0.0
-
-# Documentation
-Sphinx==6.1.2
\ No newline at end of file
+alabaster==0.7.16
+    # via sphinx
+babel==2.16.0
+    # via sphinx
+certifi==2024.8.30
+    # via requests
+charset-normalizer==3.3.2
+    # via requests
+coverage==7.6.1
+    # via pytest-cov
+docutils==0.19
+    # via sphinx
+idna==3.10
+    # via requests
+imagesize==1.4.1
+    # via sphinx
+iniconfig==2.0.0
+    # via pytest
+jinja2==3.1.4
+    # via sphinx
+markupsafe==2.1.5
+    # via jinja2
+packaging==24.1
+    # via
+    #   pytest
+    #   sphinx
+pluggy==1.5.0
+    # via pytest
+pygments==2.18.0
+    # via sphinx
+pytest==8.3.3
+    # via
+    #   language-tags (pyproject.toml)
+    #   pytest-cov
+pytest-cov==5.0.0
+    # via language-tags (pyproject.toml)
+requests==2.32.3
+    # via sphinx
+snowballstemmer==2.2.0
+    # via sphinx
+sphinx==6.1.2
+    # via language-tags (pyproject.toml)
+sphinxcontrib-applehelp==2.0.0
+    # via sphinx
+sphinxcontrib-devhelp==2.0.0
+    # via sphinx
+sphinxcontrib-htmlhelp==2.1.0
+    # via sphinx
+sphinxcontrib-jsmath==1.0.1
+    # via sphinx
+sphinxcontrib-qthelp==2.0.0
+    # via sphinx
+sphinxcontrib-serializinghtml==2.0.0
+    # via sphinx
+urllib3==2.2.3
+    # via requests
+uv==0.4.1
+    # via language-tags (pyproject.toml)
diff --git a/setup.py b/setup.py
index d1153ca..41c84c2 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #!/usr/bin/env python
 try:
     from setuptools import setup
diff --git a/tests/test_Subtag.py b/tests/test_Subtag.py
index ac3064b..3af9270 100644
--- a/tests/test_Subtag.py
+++ b/tests/test_Subtag.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import unittest
 from language_tags.Subtag import Subtag
 
diff --git a/tests/test_Tag.py b/tests/test_Tag.py
index 75dc1e4..a95bdd7 100644
--- a/tests/test_Tag.py
+++ b/tests/test_Tag.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import unittest
 from language_tags.Tag import Tag
 
diff --git a/tests/test_tags.py b/tests/test_tags.py
index 320b171..39b71bf 100644
--- a/tests/test_tags.py
+++ b/tests/test_tags.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import unittest
 import re