diff --git a/MANIFEST.in b/MANIFEST.in
index ec9752630768727648e08e12d786ae012d681eaf..674fad67b12a625a44083797d5efeb150f73981a 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -39,3 +39,6 @@ include aksetup_helper.py
 include README_SETUP.txt
 
 include README.rst
+
+include isl/LICENSE
+include isl/imath/LICENSE