diff --git a/.travis.yml b/.travis.yml
index 80f9fdc..c3b3626 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2019 TG x Thoth
+# SPDX-License-Identifier: AGPL-3.0-only
+
 language: c
 sudo: required
 install: wget https://raw.githubusercontent.com/ocaml/ocaml-ci-scripts/master/.travis-opam.sh
diff --git a/LICENSE.md b/LICENSES/AGPL-3.0-only.txt
similarity index 100%
rename from LICENSE.md
rename to LICENSES/AGPL-3.0-only.txt
diff --git a/README.md b/README.md
index e66046a..eaa5ac9 100644
--- a/README.md
+++ b/README.md
@@ -54,3 +54,8 @@ It can be consulted [online][doc] or via `odig`, e.g.:
     ...
 
 [doc]: https://p2pcollab.net/doc/ocaml/
+
+
+## License information
+
+This project is available as open source under the terms of AGPL-3.0-only license. However, for accurate information, please check individual files. As well as for copyright information. 
diff --git a/flake.nix b/flake.nix
index 6fbcc15..cd1d370 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightText: 2019 TG x Thoth
+# SPDX-License-Identifier: AGPL-3.0-only
+
 {
   description = "OCaml P2P libraries";
 
diff --git a/lib/p2p-cyclon-lwt/p2p_cyclon_lwt.ml b/lib/p2p-cyclon-lwt/p2p_cyclon_lwt.ml
index 1a7c0dc..8a1051f 100644
--- a/lib/p2p-cyclon-lwt/p2p_cyclon_lwt.ml
+++ b/lib/p2p-cyclon-lwt/p2p_cyclon_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-cyclon-lwt/s.ml b/lib/p2p-cyclon-lwt/s.ml
index 299239b..22c6bab 100644
--- a/lib/p2p-cyclon-lwt/s.ml
+++ b/lib/p2p-cyclon-lwt/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-cyclon/p2p_cyclon.ml b/lib/p2p-cyclon/p2p_cyclon.ml
index be821c4..b1b3969 100644
--- a/lib/p2p-cyclon/p2p_cyclon.ml
+++ b/lib/p2p-cyclon/p2p_cyclon.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-cyclon/p2p_cyclon.mli b/lib/p2p-cyclon/p2p_cyclon.mli
index 6bec4bf..60bfbae 100644
--- a/lib/p2p-cyclon/p2p_cyclon.mli
+++ b/lib/p2p-cyclon/p2p_cyclon.mli
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-poldercast-lwt/p2p_poldercast_lwt.ml b/lib/p2p-poldercast-lwt/p2p_poldercast_lwt.ml
index 0a3dbe4..876f4f5 100644
--- a/lib/p2p-poldercast-lwt/p2p_poldercast_lwt.ml
+++ b/lib/p2p-poldercast-lwt/p2p_poldercast_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-poldercast-lwt/s.ml b/lib/p2p-poldercast-lwt/s.ml
index d556cca..3fdc54e 100644
--- a/lib/p2p-poldercast-lwt/s.ml
+++ b/lib/p2p-poldercast-lwt/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-poldercast/node.ml b/lib/p2p-poldercast/node.ml
index 0e4e6e0..0d7d850 100644
--- a/lib/p2p-poldercast/node.ml
+++ b/lib/p2p-poldercast/node.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-poldercast/p2p_poldercast.ml b/lib/p2p-poldercast/p2p_poldercast.ml
index b82f4af..45d5fce 100644
--- a/lib/p2p-poldercast/p2p_poldercast.ml
+++ b/lib/p2p-poldercast/p2p_poldercast.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-poldercast/s.ml b/lib/p2p-poldercast/s.ml
index 0177230..75e7478 100644
--- a/lib/p2p-poldercast/s.ml
+++ b/lib/p2p-poldercast/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-ringcast-lwt/p2p_ringcast_lwt.ml b/lib/p2p-ringcast-lwt/p2p_ringcast_lwt.ml
index ed28f83..bda7e7d 100644
--- a/lib/p2p-ringcast-lwt/p2p_ringcast_lwt.ml
+++ b/lib/p2p-ringcast-lwt/p2p_ringcast_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-ringcast-lwt/s.ml b/lib/p2p-ringcast-lwt/s.ml
index 3a7e2ec..241638d 100644
--- a/lib/p2p-ringcast-lwt/s.ml
+++ b/lib/p2p-ringcast-lwt/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-ringcast/p2p_ringcast.ml b/lib/p2p-ringcast/p2p_ringcast.ml
index a4b002c..a5d7beb 100644
--- a/lib/p2p-ringcast/p2p_ringcast.ml
+++ b/lib/p2p-ringcast/p2p_ringcast.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-ringcast/s.ml b/lib/p2p-ringcast/s.ml
index 93a2570..e80d83e 100644
--- a/lib/p2p-ringcast/s.ml
+++ b/lib/p2p-ringcast/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-vicinity-lwt/p2p_vicinity_lwt.ml b/lib/p2p-vicinity-lwt/p2p_vicinity_lwt.ml
index aa808b9..75ff68b 100644
--- a/lib/p2p-vicinity-lwt/p2p_vicinity_lwt.ml
+++ b/lib/p2p-vicinity-lwt/p2p_vicinity_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-vicinity-lwt/s.ml b/lib/p2p-vicinity-lwt/s.ml
index e9ec3c5..87e358e 100644
--- a/lib/p2p-vicinity-lwt/s.ml
+++ b/lib/p2p-vicinity-lwt/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-vicinity/p2p_vicinity.ml b/lib/p2p-vicinity/p2p_vicinity.ml
index 76285a5..c8f3dd1 100644
--- a/lib/p2p-vicinity/p2p_vicinity.ml
+++ b/lib/p2p-vicinity/p2p_vicinity.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p-vicinity/s.ml b/lib/p2p-vicinity/s.ml
index 7ed4bc7..506badb 100644
--- a/lib/p2p-vicinity/s.ml
+++ b/lib/p2p-vicinity/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/group.ml b/lib/p2p/group.ml
index df4272c..fff8590 100644
--- a/lib/p2p/group.ml
+++ b/lib/p2p/group.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/group_id.ml b/lib/p2p/group_id.ml
index 005ffb5..37c3b8e 100644
--- a/lib/p2p/group_id.ml
+++ b/lib/p2p/group_id.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/msg_id.ml b/lib/p2p/msg_id.ml
index 005ffb5..37c3b8e 100644
--- a/lib/p2p/msg_id.ml
+++ b/lib/p2p/msg_id.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/node.ml b/lib/p2p/node.ml
index 8b28b60..802857d 100644
--- a/lib/p2p/node.ml
+++ b/lib/p2p/node.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/node_id.ml b/lib/p2p/node_id.ml
index c17ba62..3348388 100644
--- a/lib/p2p/node_id.ml
+++ b/lib/p2p/node_id.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/s.ml b/lib/p2p/s.ml
index 91fe6c0..6e6f4f0 100644
--- a/lib/p2p/s.ml
+++ b/lib/p2p/s.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/lib/p2p/view.ml b/lib/p2p/view.ml
index 6b297fb..98dc424 100644
--- a/lib/p2p/view.ml
+++ b/lib/p2p/view.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/p2p-cyclon-lwt.opam b/p2p-cyclon-lwt.opam
index 6a40a1a..25c13cf 100644
--- a/p2p-cyclon-lwt.opam
+++ b/p2p-cyclon-lwt.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p-cyclon-lwt"
 synopsis: "CYCLON: Lwt threads running the protocol"
diff --git a/p2p-cyclon.opam b/p2p-cyclon.opam
index fe5f2a3..7cf2efe 100644
--- a/p2p-cyclon.opam
+++ b/p2p-cyclon.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p-cyclon"
 synopsis: "CYCLON: Inexpensive Membership Management for Unstructured P2P Overlays"
diff --git a/p2p-poldercast-lwt.opam b/p2p-poldercast-lwt.opam
index 9fa0e3b..37895a6 100644
--- a/p2p-poldercast-lwt.opam
+++ b/p2p-poldercast-lwt.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "poldercast-lwt"
 synopsis: "RingCast: Lwt threads running the protocol"
diff --git a/p2p-poldercast.opam b/p2p-poldercast.opam
index 95293b3..10c129b 100644
--- a/p2p-poldercast.opam
+++ b/p2p-poldercast.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p-poldercast"
 synopsis: "PolderCast: P2P hybrid (probabilistic/deterministic) dissemination"
diff --git a/p2p-ringcast-lwt.opam b/p2p-ringcast-lwt.opam
index 535b50d..5983e7a 100644
--- a/p2p-ringcast-lwt.opam
+++ b/p2p-ringcast-lwt.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "ringcast-lwt"
 synopsis: "RingCast: Lwt threads running the protocol"
diff --git a/p2p-ringcast.opam b/p2p-ringcast.opam
index f23bf01..fe61d03 100644
--- a/p2p-ringcast.opam
+++ b/p2p-ringcast.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p-ringcast"
 synopsis: "RingCast: P2P hybrid (probabilistic/deterministic) dissemination"
diff --git a/p2p-vicinity-lwt.opam b/p2p-vicinity-lwt.opam
index 73e9e87..490a9b5 100644
--- a/p2p-vicinity-lwt.opam
+++ b/p2p-vicinity-lwt.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p-vicinity-lwt"
 synopsis: "VICINITY: Lwt threads running the protocol"
diff --git a/p2p-vicinity.opam b/p2p-vicinity.opam
index faedfbe..ee67912 100644
--- a/p2p-vicinity.opam
+++ b/p2p-vicinity.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p-vicinity"
 synopsis: "VICINITY: P2P topology management & clustering protocol"
diff --git a/p2p.opam b/p2p.opam
index a7dfedc..17d4142 100644
--- a/p2p.opam
+++ b/p2p.opam
@@ -1,3 +1,8 @@
+(*
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
+*)
+
 opam-version: "2.0"
 name: "p2p"
 synopsis: "Composable P2P network construction libraries"
diff --git a/test/p2p-cyclon-lwt/test_cyclon_lwt.ml b/test/p2p-cyclon-lwt/test_cyclon_lwt.ml
index 3c47e51..2b09a79 100644
--- a/test/p2p-cyclon-lwt/test_cyclon_lwt.ml
+++ b/test/p2p-cyclon-lwt/test_cyclon_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-cyclon/test_cyclon.ml b/test/p2p-cyclon/test_cyclon.ml
index bb8cc5d..041dfc8 100644
--- a/test/p2p-cyclon/test_cyclon.ml
+++ b/test/p2p-cyclon/test_cyclon.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-poldercast-lwt/test_poldercast_lwt.ml b/test/p2p-poldercast-lwt/test_poldercast_lwt.ml
index 9b490b3..f91a742 100644
--- a/test/p2p-poldercast-lwt/test_poldercast_lwt.ml
+++ b/test/p2p-poldercast-lwt/test_poldercast_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-poldercast/test_poldercast.ml b/test/p2p-poldercast/test_poldercast.ml
index 7356252..55f81bc 100644
--- a/test/p2p-poldercast/test_poldercast.ml
+++ b/test/p2p-poldercast/test_poldercast.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-ringcast-lwt/test_ringcast_lwt.ml b/test/p2p-ringcast-lwt/test_ringcast_lwt.ml
index 99920ed..0c1ed53 100644
--- a/test/p2p-ringcast-lwt/test_ringcast_lwt.ml
+++ b/test/p2p-ringcast-lwt/test_ringcast_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-ringcast/test_ringcast.ml b/test/p2p-ringcast/test_ringcast.ml
index e5bcf4a..8f7f254 100644
--- a/test/p2p-ringcast/test_ringcast.ml
+++ b/test/p2p-ringcast/test_ringcast.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-vicinity-lwt/test_vicinity_lwt.ml b/test/p2p-vicinity-lwt/test_vicinity_lwt.ml
index f4e0529..6a3b5a3 100644
--- a/test/p2p-vicinity-lwt/test_vicinity_lwt.ml
+++ b/test/p2p-vicinity-lwt/test_vicinity_lwt.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p-vicinity/test_vicinity.ml b/test/p2p-vicinity/test_vicinity.ml
index c42b78a..484e68b 100644
--- a/test/p2p-vicinity/test_vicinity.ml
+++ b/test/p2p-vicinity/test_vicinity.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p/test_gossip.ml b/test/p2p/test_gossip.ml
index fc5b23d..dfa7d98 100644
--- a/test/p2p/test_gossip.ml
+++ b/test/p2p/test_gossip.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by
diff --git a/test/p2p/test_view.ml b/test/p2p/test_view.ml
index a3c92ab..fd0d7bf 100644
--- a/test/p2p/test_view.ml
+++ b/test/p2p/test_view.ml
@@ -1,5 +1,6 @@
 (*
-  Copyright (C) 2019 TG x Thoth
+  SPDX-FileCopyrightText: 2019 TG x Thoth
+  SPDX-License-Identifier: AGPL-3.0-only
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as published by