diff --git a/main.cpp b/main.cpp
index 9fe1e1e..27bf506 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,3 +1,18 @@
+/*
+    InkBox: Open-source Qt-based eBook reader
+    Copyright (C) 2021 Nicolas Mailloux <nicolecrivain@gmail.com>
+    SPDX-License-Identifier: GPL-3.0-only
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation.
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 #include "mainwindow.h"
 #include "alert.h"
 #include <QApplication>