diff --git a/src/arch/helperadvsimd.h b/src/arch/helperadvsimd.h
index 7647a391..17317f11 100644
--- a/src/arch/helperadvsimd.h
+++ b/src/arch/helperadvsimd.h
@@ -1,5 +1,5 @@
 /*********************************************************************/
-/*          Copyright ARM Ltd. 2010 - 2019.                          */
+/*          Copyright ARM Ltd. 2010 - 2024.                          */
 /* Distributed under the Boost Software License, Version 1.0.        */
 /*    (See accompanying file LICENSE.txt or copy at                  */
 /*          http://www.boost.org/LICENSE_1_0.txt)                    */
diff --git a/src/arch/helperpurec_scalar.h b/src/arch/helperpurec_scalar.h
index fb83b84c..2826ea0f 100644
--- a/src/arch/helperpurec_scalar.h
+++ b/src/arch/helperpurec_scalar.h
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/arch/helperrvv.h b/src/arch/helperrvv.h
index 8450e51a..85d25d3b 100644
--- a/src/arch/helperrvv.h
+++ b/src/arch/helperrvv.h
@@ -1,3 +1,8 @@
+//   Copyright Naoki Shibata and contributors 2023.
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+
 #ifndef HELPERRVV_H
 #define HELPERRVV_H
 
diff --git a/src/arch/helpersve.h b/src/arch/helpersve.h
index 60680075..853e752e 100644
--- a/src/arch/helpersve.h
+++ b/src/arch/helpersve.h
@@ -1,5 +1,5 @@
 /*********************************************************************/
-/*          Copyright ARM Ltd. 2010 - 2019.                          */
+/*          Copyright ARM Ltd. 2010 - 2024.                          */
 /* Distributed under the Boost Software License, Version 1.0.        */
 /*    (See accompanying file LICENSE.txt or copy at                  */
 /*          http://www.boost.org/LICENSE_1_0.txt)                    */
diff --git a/src/common/commonfuncs.h b/src/common/commonfuncs.h
index 274156fc..19ec746b 100644
--- a/src/common/commonfuncs.h
+++ b/src/common/commonfuncs.h
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/common/dd.h b/src/common/dd.h
index cc8ed95a..3f3ed488 100644
--- a/src/common/dd.h
+++ b/src/common/dd.h
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2024.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/common/df.h b/src/common/df.h
index 2224c2d9..d1ab7a77 100644
--- a/src/common/df.h
+++ b/src/common/df.h
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2024.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/common/misc.h b/src/common/misc.h
index 59c53250..751719c6 100644
--- a/src/common/misc.h
+++ b/src/common/misc.h
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm-tester/iutsimd.c b/src/libm-tester/iutsimd.c
index 03fcd743..68bbb908 100644
--- a/src/libm-tester/iutsimd.c
+++ b/src/libm-tester/iutsimd.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm-tester/tester2simddp.c b/src/libm-tester/tester2simddp.c
index 5071bb70..5d2b77b6 100644
--- a/src/libm-tester/tester2simddp.c
+++ b/src/libm-tester/tester2simddp.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm-tester/tester2simdsp.c b/src/libm-tester/tester2simdsp.c
index 3fb1e619..ca017d14 100644
--- a/src/libm-tester/tester2simdsp.c
+++ b/src/libm-tester/tester2simdsp.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm-tester/tester3.c b/src/libm-tester/tester3.c
index 41023d58..865dd228 100644
--- a/src/libm-tester/tester3.c
+++ b/src/libm-tester/tester3.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm-tester/testerutil.c b/src/libm-tester/testerutil.c
index 688642ca..0ac95184 100644
--- a/src/libm-tester/testerutil.c
+++ b/src/libm-tester/testerutil.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm-tester/testerutil.h b/src/libm-tester/testerutil.h
index 4c3564e9..53350746 100644
--- a/src/libm-tester/testerutil.h
+++ b/src/libm-tester/testerutil.h
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm/dispscalar.c.org b/src/libm/dispscalar.c.org
index 3b36d1b1..ccf28c21 100644
--- a/src/libm/dispscalar.c.org
+++ b/src/libm/dispscalar.c.org
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm/sleeflibm_header.h.org.in b/src/libm/sleeflibm_header.h.org.in
index 89b3a1ca..61620464 100644
--- a/src/libm/sleeflibm_header.h.org.in
+++ b/src/libm/sleeflibm_header.h.org.in
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm/sleefsimddp.c b/src/libm/sleefsimddp.c
index d8d17a70..9b837fe4 100644
--- a/src/libm/sleefsimddp.c
+++ b/src/libm/sleefsimddp.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2024.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/libm/sleefsimdsp.c b/src/libm/sleefsimdsp.c
index 27bfda0f..d9e9100c 100644
--- a/src/libm/sleefsimdsp.c
+++ b/src/libm/sleefsimdsp.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2024.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/quad/qdispscalar.c.org b/src/quad/qdispscalar.c.org
index 81b26c9e..e1079295 100644
--- a/src/quad/qdispscalar.c.org
+++ b/src/quad/qdispscalar.c.org
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/quad/qdispx2.c.org b/src/quad/qdispx2.c.org
index 6e382951..28a1686e 100644
--- a/src/quad/qdispx2.c.org
+++ b/src/quad/qdispx2.c.org
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2023.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)
diff --git a/src/quad/sleefsimdqp.c b/src/quad/sleefsimdqp.c
index db4bba95..5a7f267d 100644
--- a/src/quad/sleefsimdqp.c
+++ b/src/quad/sleefsimdqp.c
@@ -1,4 +1,4 @@
-//   Copyright Naoki Shibata and contributors 2010 - 2021.
+//   Copyright Naoki Shibata and contributors 2010 - 2024.
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE.txt or copy at
 //          http://www.boost.org/LICENSE_1_0.txt)