diff --git a/MANIFEST.in b/MANIFEST.in
index cde3626..a1a66cb 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,6 +3,7 @@ include README.rst
 include requirements.txt
 include requirements-test.txt
 include requirements-rtd.txt
+include tox.ini
 recursive-include docs/ *
 recursive-include tests/ *
 recursive-exclude docs/build/ *