diff --git a/rpmlint.spec b/rpmlint.spec
index 53bbcb0..e764f29 100644
--- a/rpmlint.spec
+++ b/rpmlint.spec
@@ -2,7 +2,7 @@
 %bcond_without tests
 
 Name:           rpmlint
-Version:        2.3.0
+Version:        2.4.0
 Release:        1%{?dist}
 Summary:        Tool for checking common errors in RPM packages
 License:        GPL-2.0-or-later
@@ -17,26 +17,22 @@ Source5:        warn-on-functions.toml
 
 BuildArch:      noarch
 BuildRequires:  python3-devel
-BuildRequires:  %{py3_dist setuptools}
-BuildRequires:  %{py3_dist pybeam}
-BuildRequires:  %{py3_dist pyxdg}
-BuildRequires:  %{py3_dist rpm}
-BuildRequires:  %{py3_dist toml}
-BuildRequires:  %{py3_dist zstandard}
-Requires:       devscripts-checkbashisms, dash, rpm-build
-# Technically works without it, but results are better with it.
-Requires:       /usr/bin/appstream-util
-# E: fatal error while reading ...: [Errno 2] No such file or directory: 'desktop-file-validate'
-Requires:       /usr/bin/desktop-file-validate
-Requires:       %{py3_dist pyenchant}
 # tests
+%if %{with tests}
+BuildRequires:  dash
+BuildRequires:  devscripts-checkbashisms
+BuildRequires:  hunspell-cs
+BuildRequires:  hunspell-en-US
+BuildRequires:  python3dist(pytest)
+BuildRequires:  python3dist(pytest-xdist)
 BuildRequires:  /usr/bin/appstream-util
-BuildRequires:  %{py3_dist pytest}
-BuildRequires:  %{py3_dist pytest-xdist}
-BuildRequires:  %{py3_dist pyenchant}
-BuildRequires:  %{py3_dist file-magic}
-BuildRequires:  devscripts-checkbashisms, dash, hunspell-cs, hunspell-en-US
 BuildRequires:  /usr/bin/desktop-file-validate
+%endif
+Requires:       dash
+Requires:       devscripts-checkbashisms
+Requires:       rpm-build
+Requires:       /usr/bin/appstream-util
+Requires:       /usr/bin/desktop-file-validate
 
 %description
 rpmlint is a tool for checking common errors in RPM packages. Binary
@@ -54,11 +50,15 @@ sed -i -e 's/ --cov=rpmlint//' -e 's/ --flake8//' setup.cfg
 # Avoid warnings about pytest.mark.no_cover marker
 sed -i '/^@pytest.mark.no_cover/d' test/test_lint.py
 
+%generate_buildrequires
+%pyproject_buildrequires
+
 %build
-%py3_build
+%pyproject_wheel
 
 %install
-%py3_install
+%pyproject_install
+%pyproject_save_files %{name}
 
 mkdir -p %{buildroot}%{_sysconfdir}/xdg/rpmlint/
 cp -a %{SOURCE1} %{SOURCE2} %{SOURCE3} %{SOURCE4} %{SOURCE5} %{buildroot}%{_sysconfdir}/xdg/rpmlint/
@@ -68,15 +68,17 @@ cp -a %{SOURCE1} %{SOURCE2} %{SOURCE3} %{SOURCE4} %{SOURCE5} %{buildroot}%{_sysc
 %pytest
 %endif
 
-%files
-%license COPYING
+%files -f %{pyproject_files}
 %doc README.md
 %config(noreplace) %{_sysconfdir}/xdg/rpmlint/*.toml
 %{_bindir}/rpmdiff
 %{_bindir}/rpmlint
-%{python3_sitelib}/rpmlint*
 
 %changelog
+* Tue Oct 04 2022 Todd Zullinger <tmz@pobox.com> - 2.4.0-1
+- update to 2.4.0 (rhbz#2088759)
+- use python build-dependency generator
+
 * Sat Sep 24 2022 Todd Zullinger <tmz@pobox.com> - 2.3.0-1
 - update to 2.3.0 (rhbz#2088759)
 - convert license to SPDX and correct to GPL-2.0-or-later
diff --git a/sources b/sources
index f133b5c..8575672 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (rpmlint-2.3.0.tar.gz) = 8c10a58315695a5768a8f95de9bcae2cca264d48e1a672ff515a2696eee3664dc97c1653ef6e3e18e46f2286cb99430fb3eaa3b0dc6ac069a6b4b94d13584903
+SHA512 (rpmlint-2.4.0.tar.gz) = ca755c1aec2713411787bf73de70175876e8a25fca51039015042917415c596f76c2ef077edf28c8d29cdfb4ee2ae426b37df372e0e13b692cc45a5e73a99c97