diff --git a/.circleci/config.yml b/.circleci/config.yml
index 682e74d..e21da58 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -20,7 +20,8 @@ jobs:
           - pip-{{ .Branch }}-
           - pip-main-
 
-      - run: pip install -e .[testing]
+      - run: pip install flit
+      - run: flit install --deps production --extras testing
 
       - type: cache-save
         key: pip-{{ .Branch }}-{{ epoch }}
@@ -36,7 +37,8 @@ jobs:
       - checkout
       - run: git clone git@github.com:wagtail/wagtail.git
 
-      - run: pip install -e .[testing]
+      - run: pip install flit
+      - run: flit install --deps production --extras testing
       - run: pip install ./wagtail
 
       - run: python testmanage.py test
diff --git a/.nvmrc b/.nvmrc
deleted file mode 100644
index 19c7bdb..0000000
--- a/.nvmrc
+++ /dev/null
@@ -1 +0,0 @@
-16
\ No newline at end of file
diff --git a/.prettierrc.toml b/.prettierrc.toml
deleted file mode 100644
index 009474b..0000000
--- a/.prettierrc.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-tabWidth = 4
-singleQuote = true
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..24e25e0
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,56 @@
+[build-system]
+requires = ["flit_core >=3.2,<4"]
+build-backend = "flit_core.buildapi"
+
+[project]
+name = "wagtail-editable-help"
+authors = [{name = "Matt Westcott", email = "matthew@torchbox.com"}]
+description = "Make help text editable in the Wagtail admin"
+readme = "README.md"
+license = {file = "LICENSE"}
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: BSD License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Framework :: Django",
+    "Framework :: Django :: 3.2",
+    "Framework :: Django :: 4.0",
+    "Framework :: Django :: 4.1",
+    "Framework :: Wagtail",
+    "Framework :: Wagtail :: 2",
+    "Framework :: Wagtail :: 3",
+    "Framework :: Wagtail :: 4"
+]
+dynamic = ["version"]
+requires-python = ">=3.7"
+dependencies = [
+    "Django>=3.0,<4.2",
+    "wagtail>=2.15,<5",
+    "telepath>=0.3,<1"
+]
+
+[project.optional-dependencies]
+testing = [
+    "dj-database-url==0.5.0",
+    "freezegun==0.3.15"
+]
+
+[project.urls]
+Source = "https://github.com/wagtail/wagtail-editable-help"
+Documentation = "https://github.com/wagtail/wagtail-editable-help#readme"
+
+[tool.flit.module]
+name = "wagtail_editable_help"
+
+[tool.flit.sdist]
+exclude = [
+    "wagtail_editable_help/test",
+    "testmanage.py",
+]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 923a26e..0000000
--- a/setup.py
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env python
-
-from os import path
-
-from setuptools import find_packages, setup
-
-from wagtail_editable_help import __version__
-
-
-this_directory = path.abspath(path.dirname(__file__))
-with open(path.join(this_directory, "README.md"), encoding="utf-8") as f:
-    long_description = f.read()
-
-setup(
-    name="wagtail-editable-help",
-    version=__version__,
-    description="Make help text editable in the Wagtail admin",
-    long_description=long_description,
-    long_description_content_type='text/markdown',
-    author="Matt Westcott",
-    author_email="matthew@torchbox.com",
-    url="",
-    packages=find_packages(),
-    include_package_data=True,
-    license="BSD",
-    classifiers=[
-        "Development Status :: 3 - Alpha",
-        "Intended Audience :: Developers",
-        "License :: OSI Approved :: BSD License",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Framework :: Django",
-        "Framework :: Django :: 3.2",
-        "Framework :: Django :: 4.0",
-        "Framework :: Django :: 4.1",
-        "Framework :: Wagtail",
-        "Framework :: Wagtail :: 2",
-        "Framework :: Wagtail :: 3",
-    ],
-    install_requires=[
-        "Django>=3.0,<4.2",
-        "wagtail>=2.15,<5",
-        "telepath>=0.3,<1",
-    ],
-    extras_require={
-        "testing": ["dj-database-url==0.5.0", "freezegun==0.3.15"],
-    },
-    zip_safe=False,
-)