diff --git a/configure.ac b/configure.ac
index 967e4d4edd54e65fa7be9398852a78a0fc676a73..3a10af2f37df02b21b84bcf7d7045b22b3b30351 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 
-dnl Copyright (C) 2009-2018 Dynare Team
+dnl Copyright © 2009-2018 Dynare Team
 dnl
 dnl This file is part of Dynare.
 dnl
diff --git a/m4/ax_latex_class.m4 b/m4/ax_latex_class.m4
index 0c1a951923f944788c0ef3fbe7a4cb884bf4607c..0f4c881f21f34bef8e68bfefc41c3a3e02df7f8b 100644
--- a/m4/ax_latex_class.m4
+++ b/m4/ax_latex_class.m4
@@ -20,8 +20,8 @@
 #
 # LICENSE
 #
-#   Copyright (c) 2008 Boretti Mathieu <boretti@eig.unige.ch>
-#   Copyright (c) 2009 Dynare Team
+#   Copyright © 2008 Boretti Mathieu <boretti@eig.unige.ch>
+#   Copyright © 2009 Dynare Team
 #
 #   This library is free software; you can redistribute it and/or modify it
 #   under the terms of the GNU Lesser General Public License as published by
diff --git a/m4/ax_latex_test.m4 b/m4/ax_latex_test.m4
index 4d5b73a3480172830b9861e74f13af402c864e6c..5a3d012fc1d38c1b5ae43a6a5f84c91f28751488 100644
--- a/m4/ax_latex_test.m4
+++ b/m4/ax_latex_test.m4
@@ -22,8 +22,8 @@
 #
 # LICENSE
 #
-#   Copyright (c) 2008 Boretti Mathieu <boretti@eig.unige.ch>
-#   Copyright (c) 2009 Dynare Team
+#   Copyright © 2008 Boretti Mathieu <boretti@eig.unige.ch>
+#   Copyright © 2009 Dynare Team
 #
 #   This library is free software; you can redistribute it and/or modify it
 #   under the terms of the GNU Lesser General Public License as published by
diff --git a/src/DynareBison.yy b/src/DynareBison.yy
index c58743299fbe89174b85bcf66fbe69e5c98bb0c8..a4e1ab12d239242c12ad6ddf10a9b71e93f742fa 100644
--- a/src/DynareBison.yy
+++ b/src/DynareBison.yy
@@ -1,6 +1,6 @@
 // -*- C++ -*-
 /*
- * Copyright (C) 2003-2019 Dynare Team
+ * Copyright © 2003-2019 Dynare Team
  *
  * This file is part of Dynare.
  *
diff --git a/src/DynareFlex.ll b/src/DynareFlex.ll
index 998754dc7fa60e60daddf6e287ec03f4b145007c..6029e736dd0115d7bccb71a62031cebbe405e012 100644
--- a/src/DynareFlex.ll
+++ b/src/DynareFlex.ll
@@ -1,6 +1,6 @@
 /* -*- C++ -*- */
 /*
- * Copyright (C) 2003-2019 Dynare Team
+ * Copyright © 2003-2019 Dynare Team
  *
  * This file is part of Dynare.
  *
diff --git a/src/macro/MacroBison.yy b/src/macro/MacroBison.yy
index dbfebb13b13fa168525d09903c4c5a767da2a4b1..d4282a99462eccfa8722989af6960466c4123b1f 100644
--- a/src/macro/MacroBison.yy
+++ b/src/macro/MacroBison.yy
@@ -1,6 +1,6 @@
 // -*- C++ -*-
 /*
- * Copyright (C) 2008-2018 Dynare Team
+ * Copyright © 2008-2018 Dynare Team
  *
  * This file is part of Dynare.
  *
diff --git a/src/macro/MacroFlex.ll b/src/macro/MacroFlex.ll
index 46a49fd46efb3df7cc53025407b6d9ee187c1f18..5cf9956b2ca07c3d34a3124a8ae3a4338a37d050 100644
--- a/src/macro/MacroFlex.ll
+++ b/src/macro/MacroFlex.ll
@@ -1,6 +1,6 @@
 /* -*- C++ -*- */
 /*
- * Copyright (C) 2008-2017 Dynare Team
+ * Copyright © 2008-2017 Dynare Team
  *
  * This file is part of Dynare.
  *