diff --git a/tasks.py b/tasks.py
index 9464bfd..ac9fab3 100644
--- a/tasks.py
+++ b/tasks.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2021 Lance Edgar
+#  Copyright © 2010-2022 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -40,7 +40,7 @@ def release(ctx):
     Release a new version of 'rattail-mailchimp'.
     """
     shutil.rmtree('rattail_mailchimp.egg-info')
-    ctx.run('python setup.py sdist --formats=gztar')
+    ctx.run('python -m build --sdist')
 
     filename = 'rattail-mailchimp-{}.tar.gz'.format(__version__)
     ctx.run('twine upload dist/{}'.format(filename))