diff --git a/MANIFEST.in b/MANIFEST.in
index 80361cea..e75ddbc9 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,3 @@
-include README.md LICENSE.ISC LICENSE.MIT AUTHORS test_httpbin.py
+include README.md LICENSE.ISC LICENSE.MIT AUTHORS test_httpbin.py tox.ini
 recursive-include httpbin/templates *
 recursive-include httpbin/static *