diff --git a/setup.cfg b/setup.cfg
index cd9a1f5d..153ea429 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,3 +3,8 @@ count=1
 select = W1, W2, W3, E11, E124, E125, E129, E2, E3, E401, E502, E703, E711, E712, E713, E721, E731, E9
 # https://pycodestyle.readthedocs.io/en/latest/intro.html#error-codes
 max-line-length = 100
+
+[isort]
+known_third_party=dbus,gi
+known_first_party=gpodder
+