diff --git a/MANIFEST.in b/MANIFEST.in
index b3c6553..8b6054f 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1 @@
-recursive-include kos_protos/ *.py *.txt py.typed MANIFEST.in py.typed Makefile
+recursive-include kos_protos/ *.py *.txt py.typed MANIFEST.in py.typed Makefile pykos/Makefile