diff --git a/setup.cfg b/setup.cfg
index 12871ff0..4dd51425 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,2 +1,5 @@
 [metadata]
 description-file=README.md
+
+[bdist_wheel]
+universal=1
diff --git a/setup.py b/setup.py
index f9339766..19c1c603 100644
--- a/setup.py
+++ b/setup.py
@@ -27,9 +27,9 @@ setup(
             'borgmatic = borgmatic.command:main',
         ]
     },
-    obsoletes=(
+    obsoletes=[
         'atticmatic',
-    ),
+    ],
     tests_require=(
         'flexmock',
         'pytest',