diff --git a/MANIFEST.in b/MANIFEST.in
index f818e13a..a1d19d94 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,5 @@
 ## Include
-include COPYING COPYING.lesser NOTICE requirements.txt
+include COPYING COPYING.lesser NOTICE requirements.txt requirements_extras.txt
 recursive-include compiler *.py *.tl *.tsv *.txt
 
 ## Exclude