diff --git a/LICENSE.md b/LICENSE.md
index adb48d47..e866d7ac 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,4 +1,4 @@
-(C) 1995-2013 Jean-loup Gailly and Mark Adler
+(C) 1995-2024 Jean-loup Gailly and Mark Adler
 
 This software is provided 'as-is', without any express or implied
 warranty. In no event will the authors be held liable for any damages
diff --git a/arch/arm/insert_string_acle.c b/arch/arm/insert_string_acle.c
index b357f8ab..70edffe7 100644
--- a/arch/arm/insert_string_acle.c
+++ b/arch/arm/insert_string_acle.c
@@ -1,6 +1,6 @@
 /* insert_string_acle.c -- insert_string integer hash variant using ACLE's CRC instructions
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  */
diff --git a/arch/generic/insert_string_c.c b/arch/generic/insert_string_c.c
index cfe39837..3e1e0384 100644
--- a/arch/generic/insert_string_c.c
+++ b/arch/generic/insert_string_c.c
@@ -1,6 +1,6 @@
 /* insert_string.c -- insert_string integer hash variant
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  */
diff --git a/arch/generic/slide_hash_c.c b/arch/generic/slide_hash_c.c
index b9fbbdb6..8345b9e3 100644
--- a/arch/generic/slide_hash_c.c
+++ b/arch/generic/slide_hash_c.c
@@ -1,6 +1,6 @@
 /* slide_hash.c -- slide hash table C implementation
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
diff --git a/arch/x86/insert_string_sse42.c b/arch/x86/insert_string_sse42.c
index 0cccf1d3..9871661e 100644
--- a/arch/x86/insert_string_sse42.c
+++ b/arch/x86/insert_string_sse42.c
@@ -1,6 +1,6 @@
 /* insert_string_sse42.c -- insert_string integer hash variant using SSE4.2's CRC instructions
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  */
diff --git a/insert_string_roll.c b/insert_string_roll.c
index dfea347b..4dbf0d4a 100644
--- a/insert_string_roll.c
+++ b/insert_string_roll.c
@@ -1,6 +1,6 @@
 /* insert_string_roll.c -- insert_string rolling hash variant
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  */
diff --git a/insert_string_tpl.h b/insert_string_tpl.h
index c8461773..a4b0c4a5 100644
--- a/insert_string_tpl.h
+++ b/insert_string_tpl.h
@@ -4,7 +4,7 @@
 /* insert_string.h -- Private insert_string functions shared with more than
  *                    one insert string implementation
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  *
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  * Authors:
diff --git a/match_tpl.h b/match_tpl.h
index 4856d64d..d32c29d7 100644
--- a/match_tpl.h
+++ b/match_tpl.h
@@ -1,6 +1,6 @@
 /* match_tpl.h -- find longest match template for compare256 variants
  *
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
  * For conditions of distribution and use, see copyright notice in zlib.h
  *
  * Portions copyright (C) 2014-2021 Konstantin Nosov
diff --git a/win32/Makefile.a64 b/win32/Makefile.a64
index bebe01ba..b32b2ce1 100644
--- a/win32/Makefile.a64
+++ b/win32/Makefile.a64
@@ -1,5 +1,5 @@
 # Makefile for zlib using Microsoft (Visual) C
-# zlib is copyright (C) 1995-2006 Jean-loup Gailly and Mark Adler
+# zlib is copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
 #
 # Usage:
 #   nmake -f win32/Makefile.a64                          (standard build)
diff --git a/win32/Makefile.arm b/win32/Makefile.arm
index 011e44e7..3f6ca3b9 100644
--- a/win32/Makefile.arm
+++ b/win32/Makefile.arm
@@ -1,5 +1,5 @@
 # Makefile for zlib using Microsoft (Visual) C
-# zlib is copyright (C) 1995-2006 Jean-loup Gailly and Mark Adler
+# zlib is copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
 #
 # Usage:
 #   nmake -f win32/Makefile.arm                          (standard build)
diff --git a/win32/Makefile.msc b/win32/Makefile.msc
index 29595f25..d3b2a85b 100644
--- a/win32/Makefile.msc
+++ b/win32/Makefile.msc
@@ -1,5 +1,5 @@
 # Makefile for zlib using Microsoft (Visual) C
-# zlib is copyright (C) 1995-2006 Jean-loup Gailly and Mark Adler
+# zlib is copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
 #
 # Usage:
 #   nmake -f win32/Makefile.msc                          (standard build)