diff --git a/MANIFEST.in b/MANIFEST.in
index 73ea9e2e8b..165c1f15bc 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,5 @@
 include AUTHORS LICENSE .functests .unittests .probetests test/__init__.py
-include CHANGELOG README.md
+include CHANGELOG CONTRIBUTING.md README.md
 include babel.cfg
 include test/sample.conf
 include tox.ini