diff --git a/source/sources/ical_feed.ts b/source/sources/ical_feed.ts
index d63c20b..4238e99 100644
--- a/source/sources/ical_feed.ts
+++ b/source/sources/ical_feed.ts
@@ -1,3 +1,23 @@
+/*
+This file is part of »munin«.
+
+Copyright 2025 'Fenris Wolf' <fenris@folksprak.org>
+
+»munin« is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+»munin« 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with »munin«. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 namespace _munin.sources.ical_feed
 {
 
diff --git a/source/types.ts b/source/types.ts
index fa0c4b0..51ec907 100644
--- a/source/types.ts
+++ b/source/types.ts
@@ -1,3 +1,23 @@
+/*
+This file is part of »munin«.
+
+Copyright 2025 'Fenris Wolf' <fenris@folksprak.org>
+
+»munin« is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+»munin« 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with »munin«. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 namespace _munin
 {