diff --git a/dkim/__init__.py b/dkim/__init__.py
index e08edcd..32ce8ba 100644
--- a/dkim/__init__.py
+++ b/dkim/__init__.py
@@ -24,7 +24,7 @@
 # Contact: Brandon Long <blong@google.com>
 #
 # This has been modified from the original software.
-# Copyright (c) 2016, 2017, 2018 Scott Kitterman <scott@kitterman.com>
+# Copyright (c) 2016, 2017, 2018, 2019 Scott Kitterman <scott@kitterman.com>
 #
 # This has been modified from the original software.
 # Copyright (c) 2017 Valimail Inc
diff --git a/dkim/arcsign.py b/dkim/arcsign.py
index 12ed72a..0153d12 100644
--- a/dkim/arcsign.py
+++ b/dkim/arcsign.py
@@ -24,6 +24,13 @@
 # This has been modified from the original software.
 # Copyright (c) 2016 Google, Inc.
 # Contact: Brandon Long <blong@google.com>
+# This has been modified from the original software.
+# Copyright (c) 2017, 2018, 2019 Scott Kitterman <scott@kitterman.com>
+#
+# This has been modified from the original software.
+# Copyright (c) 2017 Valimail Inc
+# Contact: Gene Shuman <gene@valimail.com>
+
 
 from __future__ import print_function