diff --git a/CMakeLists.txt b/CMakeLists.txt
index cbc26c6..8a68353 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,10 @@
+# SPDX-FileCopyrightText: Dora "cat" <cat@thenight.club>
+# SPDX-License-Identifier: MPL-2.0
+#
+# This Source Code Form is subject to the terms of the Mozilla Public License,
+# v. 2.0. If a copy of the MPL was not distributed with this file, You can
+# obtain one at http://mozilla.org/MPL/2.0/.
+
 cmake_minimum_required(VERSION 3.10)
 
 project(Tourmaline VERSION 1)