diff --git a/src/addressbook.cpp b/src/addressbook.cpp
index d5f9b55..4e0694a 100644
--- a/src/addressbook.cpp
+++ b/src/addressbook.cpp
@@ -1,3 +1,5 @@
+// Copyright 2019-2020 The Hush Developers
+// Released under the GPLv3
 #include "addressbook.h"
 #include "ui_addressbook.h"
 #include "ui_mainwindow.h"