diff --git a/src/plugins/relay/api/weechat-relay-api.yaml b/src/plugins/relay/api/weechat-relay-api.yaml
index 362c4f985..504a26b06 100644
--- a/src/plugins/relay/api/weechat-relay-api.yaml
+++ b/src/plugins/relay/api/weechat-relay-api.yaml
@@ -1,5 +1,7 @@
 openapi: 3.1.0
 
+# SPDX-FileCopyrightText: 2003-2025 Sébastien Helleu <flashcode@flashtux.org>
+
 info:
   title: WeeChat Relay API
   description: |-