diff --git a/proto/src/erlang/rebar.config b/proto/src/erlang/rebar.config
index 31ec32a36942f272586a6d453ffc234a3fb17d3d..55e139eabf9bf5e0bdcb66af889d78bdc8aa9c11 100644
--- a/proto/src/erlang/rebar.config
+++ b/proto/src/erlang/rebar.config
@@ -1,3 +1,17 @@
+% Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
+%
+% Licensed under the Apache License, Version 2.0 (the "License");
+% you may not use this file except in compliance with the License.
+% You may obtain a copy of the License at
+%
+%      http://www.apache.org/licenses/LICENSE-2.0
+%
+% Unless required by applicable law or agreed to in writing, software
+% distributed under the License is distributed on an "AS IS" BASIS,
+% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+% See the License for the specific language governing permissions and
+% limitations under the License.
+
 {erl_opts, [debug_info]}.
 {deps, [grpcbox]}.