diff --git a/README.md b/README.md
index 592c641..fc5406f 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 
 
 An example project built with [pybind11][], [CUDA][], and
-[scikit-build-core][]. Python 3.9+.
+[scikit-build-core][]. Python 3.11+.
 
 The extension renders the [Mandelbrot set][mandelbrot] two ways — once on the
 CPU and once on the GPU — so you can read both side by side and compare their
diff --git a/pyproject.toml b/pyproject.toml
index df545a8..aeb22dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,12 +13,10 @@ readme = "README.md"
 authors = [
   { name = "My Name", email = "me@email.com" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 classifiers = [
   "Development Status :: 4 - Beta",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.9",
-  "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",