diff --git a/misp_modules/modules/expansion/domaintools.py b/misp_modules/modules/expansion/domaintools.py
index d952fdf..353b456 100755
--- a/misp_modules/modules/expansion/domaintools.py
+++ b/misp_modules/modules/expansion/domaintools.py
@@ -1,3 +1,7 @@
+# This module does not appear to be actively maintained.
+# Please see https://github.com/DomainTools/domaintools_misp
+# for the official DomainTools-supported MISP app
+
 import json
 import logging
 import sys