diff --git a/MANIFEST.in b/MANIFEST.in
index 7455025d89384c585ad48ff31184518092d8ef82..042bdc2aaca2235a1e17301efc82c1f6ff5b9f47 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,3 @@
-include README.rst bootstrap-buildout.py buildout.cfg develop.cfg version.txt
+include README.rst bootstrap-buildout.py buildout.cfg develop.cfg COPYING requirements.txt version.txt
 recursive-include doc *.rst
 recursive-include gridtk *.sh