diff --git a/MANIFEST.in b/MANIFEST.in
index 650744ca..2c0fb95c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,2 @@
-include README.rst LICENSE NOTICE HISTORY.rst pytest.ini
+include README.rst LICENSE NOTICE HISTORY.rst pytest.ini requirements.txt
 recursive-include tests *.py