diff --git a/.gitmodules b/.gitmodules
index 3a30f40f8..4525a136b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2025 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 [submodule "3rdparty"]
 	path = 3rdparty
 	url = https://github.com/LibreSign/3rdparty.git