diff --git a/MANIFEST.in b/MANIFEST.in
index eac2a1514..4c6d59466 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -7,6 +7,7 @@ include VERSION
 include requirements.txt
 include test-requirements.txt
 include git/py.typed
+include tox.ini
 
 recursive-include doc *
 recursive-exclude test *