diff --git a/Makefile b/Makefile
index 3379b8fff..9ac77bb07 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2022 Slavi Pantaleev
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 .PHONY: roles lint
 
 help: ## Show this help.
diff --git a/YEAR-IN-REVIEW.md b/YEAR-IN-REVIEW.md
index bac3d10ac..e66882873 100644
--- a/YEAR-IN-REVIEW.md
+++ b/YEAR-IN-REVIEW.md
@@ -1,3 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2023 - 2024 Slavi Pantaleev
+SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # 2023
 
 2023 was a year filled with many changes for matrix-docker-ansible-deploy. In this post, we're looking backward at some of the major changes that happened this year, as well as taking a glimpse of what's ahead in 2024.
diff --git a/jitsi_jvb.yml b/jitsi_jvb.yml
index 33786bebe..d57c15a97 100644
--- a/jitsi_jvb.yml
+++ b/jitsi_jvb.yml
@@ -1,3 +1,10 @@
+# SPDX-FileCopyrightText: 2022 Warren Bailey
+# SPDX-FileCopyrightText: 2023 Antonis Christofides
+# SPDX-FileCopyrightText: 2023 Slavi Pantaleev
+# SPDX-FileCopyrightText: 2025 Suguru Hirahara
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 ---
 - name: "Set up additional Jitsi Videobridge (JVB) servers"
   hosts: "jitsi_jvb_servers"
diff --git a/justfile b/justfile
index ca57d6143..a2bab08f2 100644
--- a/justfile
+++ b/justfile
@@ -1,3 +1,9 @@
+# SPDX-FileCopyrightText: 2023 - 2024 Nikita Chernyi
+# SPDX-FileCopyrightText: 2023 - 2024 Slavi Pantaleev
+# SPDX-FileCopyrightText: 2024 Suguru Hirahara
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 # Shows help
 default:
     @{{ just_executable() }} --list --justfile {{ justfile() }}