diff --git a/MANIFEST.in b/MANIFEST.in
index e9aaa831885..26f9401f2d9 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,6 +1,7 @@
 include *.c
 include *.h
 include *.in
+include *.lock
 include *.md
 include *.py
 include *.rst
@@ -9,6 +10,7 @@ include *.txt
 include *.yaml
 include LICENSE
 include Makefile
+include Pipfile
 include tox.ini
 graft Tests
 graft src