diff --git a/pyproject.toml b/pyproject.toml
index 78f6535f..4b0aac2b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 # Minimum requirements for the build system to execute.
-requires = ["setuptools", "wheel"] # PEP 508 specifications.
+requires = ["setuptools>=46.4.0", "wheel"] # PEP 508 specifications.
 
 # Actually tell PEP517 tools to call setuptools
 build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
index 05936ff3..ecc3f5b6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -23,6 +23,12 @@ classifiers =
 [options]
 packages = ppb_vector
 python_requires = >= 3.7
+
+setup_requires =
+	pytest-runner
+install_requires = file: requirements.txt
+test_requires = file: requirements-tests.txt
+
 zip_safe = True
 
 [aliases]
diff --git a/setup.py b/setup.py
deleted file mode 100755
index 257640f6..00000000
--- a/setup.py
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/usr/bin/env python3
-from setuptools import setup
-
-
-def requirements(section=None):
-    """Helper for loading dependencies from requirements files."""
-    if section is None:
-        filename = "requirements.txt"
-    else:
-        filename = f"requirements-{section}.txt"
-
-    with open(filename) as file:
-        return [line.strip() for line in file]
-
-
-# See setup.cfg for the actual configuration.
-setup(
-    # setup needs to be able to import the library, for attr: to work
-    setup_requires=requirements() + ['pytest-runner'],
-    install_requires=requirements(),
-    tests_require=requirements('tests'),
-)