diff --git a/src/dirname.c b/src/dirname.c
index 11aaa66..099dd90 100644
--- a/src/dirname.c
+++ b/src/dirname.c
@@ -1,5 +1,5 @@
 /* $Id$ */
-/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
+/* Copyright (c) 2004-2020 Pierre Pronchery <khorben@defora.org> */
 /* This file is part of DeforaOS Unix utils */
 /* This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/src/du.c b/src/du.c
index 1e76e9c..d0f20f1 100644
--- a/src/du.c
+++ b/src/du.c
@@ -1,5 +1,5 @@
 /* $Id$ */
-/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
+/* Copyright (c) 2004-2020 Pierre Pronchery <khorben@defora.org> */
 /* This file is part of DeforaOS Unix utils */
 /* This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/src/echo.c b/src/echo.c
index 9671ce4..e365a83 100644
--- a/src/echo.c
+++ b/src/echo.c
@@ -1,5 +1,5 @@
 /* $Id$ */
-/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
+/* Copyright (c) 2004-2020 Pierre Pronchery <khorben@defora.org> */
 /* This file is part of DeforaOS Unix utils */
 /* This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/src/false.c b/src/false.c
index 96a1a67..14a2e7f 100644
--- a/src/false.c
+++ b/src/false.c
@@ -1,5 +1,5 @@
 /* $Id$ */
-/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
+/* Copyright (c) 2004-2020 Pierre Pronchery <khorben@defora.org> */
 /* This file is part of DeforaOS Unix utils */
 /* This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/src/file.c b/src/file.c
index 9c0fb8c..611d377 100644
--- a/src/file.c
+++ b/src/file.c
@@ -1,5 +1,5 @@
 /* $Id$ */
-/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
+/* Copyright (c) 2005-2020 Pierre Pronchery <khorben@defora.org> */
 /* This file is part of DeforaOS Unix utils */
 /* This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/src/find.c b/src/find.c
index 5b0623b..3e72ff4 100644
--- a/src/find.c
+++ b/src/find.c
@@ -1,5 +1,5 @@
 /* $Id$ */
-/* Copyright (c) 2009 Pierre Pronchery <khorben@defora.org> */
+/* Copyright (c) 2007-2020 Pierre Pronchery <khorben@defora.org> */
 /* This file is part of DeforaOS Unix utils */
 /* This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by