diff --git a/pyproject.toml b/pyproject.toml
index 6f7e474..ed70437 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-  "setuptools >= 43",
+  "setuptools >= 46.4.0",
 ]
 build-backend = "setuptools.build_meta"
 
diff --git a/setup.cfg b/setup.cfg
index 10332bd..ae01e92 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,6 @@
 [metadata]
 name = curtsies
+version = attr: curtsies.__version__
 description = Curses-like terminal wrapper, with colored strings!
 long_description = file: README.md,
 long_description_content_type = text/markdown
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 0a2f524..0000000
--- a/setup.py
+++ /dev/null
@@ -1,16 +0,0 @@
-from setuptools import setup
-import ast
-import os
-
-
-def version():
-    """Return version string."""
-    with open(os.path.join("curtsies", "__init__.py")) as input_file:
-        for line in input_file:
-            if line.startswith("__version__"):
-                return ast.parse(line).body[0].value.s
-
-
-setup(
-    version=version(),
-)