diff --git a/setup.cfg b/setup.cfg
index 779c34de0..744217f41 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -34,3 +34,6 @@ not_skip=__init__.py
 known_first_party=trezorlib
 known_third_party=hidapi, rlp, ethjsonrpc, ecdsa, mnemonic, requests, click, pyblake2, \
     usb, construct, pytest
+
+[sdist]
+formats = xztar