diff --git a/.github/workflows/ci-release-docs.yml b/.github/workflows/ci-release-docs.yml
index cc70d703..4b7dd427 100644
--- a/.github/workflows/ci-release-docs.yml
+++ b/.github/workflows/ci-release-docs.yml
@@ -20,7 +20,7 @@ jobs:
         pip install -r requirements.txt
         pip install -r docs/requirements.txt
     - name: Sphinx Api Docs
-      run: sphinx-apidoc -F -H "App Store Server Library" -A "Apple Inc." -V "0.2.1" -e -a -o _staging . tests setup.py
+      run: sphinx-apidoc -F -H "App Store Server Library" -A "Apple Inc." -V "0.2.1" -e -a -o _staging . tests pyproject.toml
     - name: Spinx build
       run: sphinx-build -b html _staging _build
     - name: Upload docs
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..f5f8b79f
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,34 @@
+# Copyright (c) 2025 Apple Inc. Licensed under MIT License.
+
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "app-store-server-library"
+version = "1.9.0"
+description = "The App Store Server Library"
+readme = {file = "README.md", content-type = "text/markdown"}
+license = {text = "MIT"}
+requires-python = ">=3.7, <4"
+classifiers = [
+    "License :: OSI Approved :: MIT License"
+]
+dependencies = [
+    "attrs>=21.3.0",
+    "PyJWT>=2.6.0,<3",
+    "requests>=2.28.0,<3",
+    "cryptography>=40.0.0",
+    "pyOpenSSL>=23.1.1",
+    "asn1==2.8.0",
+    "cattrs>=23.1.2",
+]
+
+[project.optional-dependencies]
+async = ["httpx"]
+
+[tool.setuptools]
+packages = {find = {exclude = ["tests"]}}
+
+[tool.setuptools.package-data]
+appstoreserverlibrary = ["py.typed"]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 31ba801c..00000000
--- a/setup.py
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright (c) 2023 Apple Inc. Licensed under MIT License.
-
-import pathlib
-
-from setuptools import find_packages, setup
-
-here = pathlib.Path(__file__).parent.resolve()
-long_description = (here / "README.md").read_text(encoding="utf-8")
-
-setup(
-    name="app-store-server-library",
-    version="1.9.0",
-    description="The App Store Server Library",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    packages=find_packages(exclude=["tests"]),
-    python_requires=">=3.7, <4",
-    install_requires=["attrs >= 21.3.0", 'PyJWT >= 2.6.0, < 3', 'requests >= 2.28.0, < 3', 'cryptography >= 40.0.0', 'pyOpenSSL >= 23.1.1', 'asn1==2.8.0', 'cattrs >= 23.1.2'],
-    extras_require={
-        "async": ["httpx"],
-    },
-    package_data={"appstoreserverlibrary": ["py.typed"]},
-    license="MIT",
-    classifiers=["License :: OSI Approved :: MIT License"],
-)