diff --git a/README.md b/README.md
index 185bed9..a66ce8f 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,5 @@ $ mvn -B archetype:generate -DgroupId=org.cgiar.cgspace.ctasks -DartifactId=dspa
 
 ## License
 This work is licensed under the [GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html).
+
+This repository contains data from the [Debian iso-codes project](https://salsa.debian.org/iso-codes-team/iso-codes) project, which is licensed under the [GNU Lesser General Public License v2.1](https://salsa.debian.org/iso-codes-team/iso-codes/-/blob/main/COPYING).