diff --git a/adafruit_binascii.py b/adafruit_binascii.py
index 7880557..5b8d291 100644
--- a/adafruit_binascii.py
+++ b/adafruit_binascii.py
@@ -1,4 +1,5 @@
-# SPDX-FileCopyrightText: 2014 Paul Sokolovsky for Adafruit Industries
+# SPDX-FileCopyrightText: 2014 Paul Sokolovsky
+# SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
 #
 # SPDX-License-Identifier: MIT