diff --git a/MANIFEST.in b/MANIFEST.in
index af8aae7e7..05ff5bd1a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,6 +5,7 @@ include README.rst
 include THANKS
 include requirements_dev.txt
 include requirements_test.txt
+include tox.ini
 recursive-include tests *
 recursive-include examples *
 recursive-include docs *