diff --git a/headers/closed-source/CEA_FSF_LGPL b/headers/closed-source/CEA_FSF_LGPL
index ef54b1c567a90e14ef936bac0025b3380db1df07..4d05ee50c3a200c350d6aa54187c664ca06bf9a0 100644
--- a/headers/closed-source/CEA_FSF_LGPL
+++ b/headers/closed-source/CEA_FSF_LGPL
@@ -1,7 +1,7 @@
 
 This file is part of Frama-C.
 
-Copyright (C) 1995-2024
+Copyright (C) 1995-2021
   Free Software Foundation, Inc.
 Copyright (C) 2021-2024
   CEA (Commissariat à l'énergie atomique et aux énergies
diff --git a/headers/open-source/CEA_FSF_LGPL b/headers/open-source/CEA_FSF_LGPL
index ef54b1c567a90e14ef936bac0025b3380db1df07..4d05ee50c3a200c350d6aa54187c664ca06bf9a0 100644
--- a/headers/open-source/CEA_FSF_LGPL
+++ b/headers/open-source/CEA_FSF_LGPL
@@ -1,7 +1,7 @@
 
 This file is part of Frama-C.
 
-Copyright (C) 1995-2024
+Copyright (C) 1995-2021
   Free Software Foundation, Inc.
 Copyright (C) 2021-2024
   CEA (Commissariat à l'énergie atomique et aux énergies
diff --git a/share/libc/argz.c b/share/libc/argz.c
index 113654bad71fb178d30bd1efe1fa933df28b9e85..61da9d43f1b6a48fc37cf45250a3f2ecf5c58bfc 100644
--- a/share/libc/argz.c
+++ b/share/libc/argz.c
@@ -2,7 +2,7 @@
 /*                                                                        */
 /*  This file is part of Frama-C.                                         */
 /*                                                                        */
-/*  Copyright (C) 1995-2024                                               */
+/*  Copyright (C) 1995-2021                                               */
 /*    Free Software Foundation, Inc.                                      */
 /*  Copyright (C) 2021-2024                                               */
 /*    CEA (Commissariat à l'énergie atomique et aux énergies              */
diff --git a/share/libc/argz.h b/share/libc/argz.h
index 29866a875e972104b50a4b7b7b1ac1cf23528c7a..3fc67b41c5a425b8bcd49ae31e679402ce79b376 100644
--- a/share/libc/argz.h
+++ b/share/libc/argz.h
@@ -2,7 +2,7 @@
 /*                                                                        */
 /*  This file is part of Frama-C.                                         */
 /*                                                                        */
-/*  Copyright (C) 1995-2024                                               */
+/*  Copyright (C) 1995-2021                                               */
 /*    Free Software Foundation, Inc.                                      */
 /*  Copyright (C) 2021-2024                                               */
 /*    CEA (Commissariat à l'énergie atomique et aux énergies              */