diff --git a/test/matplotlibcpp.h b/test/matplotlibcpp.h
index d95d46ad41379be376401b2b761e8a1d47bfee62..cd41047f0a289ba605215d4fe86b7a3fd2c4bed2 100644
--- a/test/matplotlibcpp.h
+++ b/test/matplotlibcpp.h
@@ -1,3 +1,24 @@
+//--------LICENSE_START--------
+//
+// Copyright (C) 2020,2021,2022 Institut de Robòtica i Informàtica Industrial, CSIC-UPC.
+// Authors: Joan Vallvé Navarro (jvallve@iri.upc.edu)
+// All rights reserved.
+//
+// This file is part of laser_scan_utils
+// laser_scan_utils is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+//--------LICENSE_END--------
 #pragma once
 
 // Python headers must be included before any system headers, since