diff --git a/.cruft.json b/.cruft.json
index 099fa975..f6b9c682 100644
--- a/.cruft.json
+++ b/.cruft.json
@@ -11,7 +11,7 @@
       "author_email": "sunpy@googlegroups.com",
       "project_url": "https://sunkit-spex.readthedocs.io",
       "license": "BSD 3-Clause",
-      "minimum_python_version": "3.9",
+      "minimum_python_version": "3.10",
       "use_compiled_extensions": "n",
       "enable_dynamic_dev_versions": "y",
       "include_example_code": "n",
diff --git a/pyproject.toml b/pyproject.toml
index 3d48dccc..bfd79d33 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "sunkit_spex"
 description = "A package for solar X-ray spectroscopy."
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 readme = { file = "README.rst", content-type = "text/x-rst" }
 license = { file = "licenses/LICENSE.rst" }
 authors = [