diff --git a/photo21/static/layout.css b/photo21/static/layout.css
index 72c7b37..01d1ef6 100644
--- a/photo21/static/layout.css
+++ b/photo21/static/layout.css
@@ -1,3 +1,9 @@
+/*
+This file is part of photo21
+Copyright (C) 2022  Amicale des élèves de l'ENS Paris-Saclay
+SPDX-License-Identifier: GPL-3.0-or-later
+*/
+
 /* Login view */
 .login {
   max-width: 35rem;