diff --git a/docs/alternative-architectures.md b/docs/alternative-architectures.md
index fa05a4b46..63127b317 100644
--- a/docs/alternative-architectures.md
+++ b/docs/alternative-architectures.md
@@ -1,3 +1,11 @@
+<!--
+SPDX-FileCopyrightText: 2020 - 2022 Slavi Pantaleev
+SPDX-FileCopyrightText: 2020 Horvath Gergely
+SPDX-FileCopyrightText: 2024 Suguru Hirahara
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Alternative architectures
 
 As stated in the [Prerequisites](prerequisites.md), currently only `amd64` (`x86_64`) is fully supported.
diff --git a/docs/configuring-playbook.md b/docs/configuring-playbook.md
index 5edc22326..2220c9d3f 100644
--- a/docs/configuring-playbook.md
+++ b/docs/configuring-playbook.md
@@ -1,3 +1,19 @@
+<!--
+SPDX-FileCopyrightText: 2018 - 2025 Slavi Pantaleev
+SPDX-FileCopyrightText: 2018 - 2024 MDAD project contributors
+SPDX-FileCopyrightText: 2020 Sabine Laszakovits
+SPDX-FileCopyrightText: 2021 Cody Neiman
+SPDX-FileCopyrightText: 2021 Matthew Cengia
+SPDX-FileCopyrightText: 2021 Toni Spets
+SPDX-FileCopyrightText: 2022 Julian Foad
+SPDX-FileCopyrightText: 2022 Julian-Samuel Gebühr
+SPDX-FileCopyrightText: 2022 Vladimir Panteleev
+SPDX-FileCopyrightText: 2023 Shreyas Ajjarapu
+SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Configuring the playbook
 
 <sup>[Prerequisites](prerequisites.md) > [Configuring your DNS settings](configuring-dns.md) > [Getting the playbook](getting-the-playbook.md) > Configuring the playbook > [Installing](installing.md)</sup>