diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
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--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,51 @@
+# SPDX-FileCopyrightText: 2024 Tobias Schmidl
+#
+# SPDX-License-Identifier: MIT
+
+[project]
+name = "pelican-theme-flex"
+description = "The minimalist Pelican theme"
+authors = [{name = "Alexandre Vincenzi", email = "git@alxd.me"}, {name = "Tobias Schmidl", email = "tobias@schmidl.dev"}]
+license = { text = "MIT" }
+readme = "README.md"
+keywords = ["pelican", "theme", "flex"]
+version = "2.5.0"
+
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Environment :: Console",
+    "Framework :: Pelican",
+    "Framework :: Pelican :: Themes",
+    "Intended Audience :: End Users/Desktop",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: OS Independent",
+    "Topic :: Internet :: WWW/HTTP",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+
+requires-python = ">=3.8.1,<4.0"
+dependencies = [
+    "pelican>=4.5",
+]
+
+[project.urls]
+Documentation = "https://git.kabelsalat.ch/s3lph/pelican-plugin-activitypub/src/branch/main/README.md"
+Source = "https://git.kabelsalat.ch/s3lph/pelican-plugin-activitypub/"
+Tracker = "https://git.kabelsalat.ch/s3lph/pelican-plugin-activitypub/issues"
+
+
+[build-system]
+requires = ["setuptools >= 61.0"]
+build-backend = "setuptools.build_meta"
+
+#[tool.setuptools]
+# ...
+# By default, include-package-data is true in pyproject.toml,
+# so you do NOT have to specify this line.
+#include-package-data = true
+
+[tool.setuptools.packages.find]
+where = ["pelican/themes/Flex"]
+
+[tool.setuptools.package-data]
+"*" = [ "*.min.css", "*.html", "*.min.js","*.png","*.ttf","*.wasm","*.woff2" ]