diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 226f8ea..32be06f 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -16,10 +16,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.8
+    - name: Set up Python 3.11
       uses: actions/setup-python@v2
       with:
-        python-version: 3.8
+        python-version: 3.11
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..f7a1cfe
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,35 @@
+[build-system]
+requires = ["setuptools>=77", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "numpyencoder"
+version = "0.3.2"
+description = "Python JSON encoder for handling Numpy data types."
+readme = { file = "README.md", content-type = "text/markdown" }
+
+requires-python = ">=3.6"
+license = "MIT"
+license-files = ["LICENSE"]
+
+authors = [
+  { name = "Hunter M. Allen", email = "allenhm@gmail.com" },
+]
+
+keywords = ["numpy", "json", "encoder"]
+
+classifiers = [
+  "Programming Language :: Python :: 3",
+  "Operating System :: OS Independent",
+]
+
+dependencies = [
+  "numpy>=1.14.3",
+  "packaging>=20.0",
+]
+
+[project.urls]
+Homepage = "https://github.com/hmallen/numpyencoder"
+
+[tool.setuptools.packages.find]
+include = ["numpyencoder*"]
diff --git a/setup.py b/setup.py
deleted file mode 100644
index bb064e3..0000000
--- a/setup.py
+++ /dev/null
@@ -1,28 +0,0 @@
-from setuptools import setup
-
-with open("README.md", "r", encoding="utf-8") as fh:
-    long_description = fh.read()
-
-setup(
-    name="numpyencoder",
-    version="0.3.2",
-    author="Hunter M. Allen",
-    author_email="allenhm@gmail.com",
-    license="MIT",
-    packages=["numpyencoder"],
-    install_requires=[
-        "numpy>=1.14.3",
-        "packaging>=20.0",
-    ],
-    description="Python JSON encoder for handling Numpy data types.",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/hmallen/numpyencoder",
-    keywords=["numpy", "json", "encoder"],
-    classifiers=[
-        "Programming Language :: Python :: 3",
-        "License :: OSI Approved :: MIT License",
-        "Operating System :: OS Independent",
-    ],
-    python_requires=">=3.6",
-)