diff --git a/re2o/templatetags/custom_link.py b/re2o/templatetags/custom_link.py
index f9046097..5e062643 100644
--- a/re2o/templatetags/custom_link.py
+++ b/re2o/templatetags/custom_link.py
@@ -1,4 +1,22 @@
-from django import template
+# Re2o est un logiciel d'administration développé initiallement au Rézo Metz. Il
+# se veut agnostique au réseau considéré, de manière à être installable en
+# quelques clics.
+#
+# Copyright © 2022 Cyprien de Cerval
+#
+# 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; either version 2 of the License, or
+# (at your option) any later version.
+#
+# 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, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.from django import template
 from re2o.settings_local import OPTIONNAL_LINK_RE2O
 
 register = template.Library()