diff --git a/README.rst b/README.rst
index 910c2d7..d1a1c31 100644
--- a/README.rst
+++ b/README.rst
@@ -41,5 +41,7 @@ Features:
 * I-Form custom contact template.
 * I-Form overriden theme.
 
+Forked from https://github.com/tu-graz-library/invenio-theme-tugraz
+
 Further documentation is available on
 https://invenio-theme-iform.readthedocs.io/