diff --git a/MANIFEST.in b/MANIFEST.in
index 0c082ea32..bb7efba38 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
-include README.rst CHANGES.rst
+include README.rst CHANGES.rst linter_plugin.py
 recursive-include letsencrypt *.json
 recursive-include letsencrypt *.sh
 recursive-include letsencrypt *.conf