diff --git a/tasks.py b/tasks.py
index 5ad2c81..b09b83a 100644
--- a/tasks.py
+++ b/tasks.py
@@ -14,13 +14,13 @@ exec(open(os.path.join(here, 'messkit', '_version.py')).read())
 
 
 @task
-def release(ctx):
+def release(c):
     """
     Release a new version of Messkit
     """
     # rebuild local tar.gz file for distribution
     shutil.rmtree('Messkit.egg-info')
-    ctx.run('python setup.py sdist --formats=gztar')
+    c.run('python -m build --sdist')
 
     # upload to public PyPI
-    ctx.run('twine upload dist/Messkit-{}.tar.gz'.format(__version__))
+    c.run('twine upload dist/Messkit-{}.tar.gz'.format(__version__))