diff --git a/NOTICE.md b/NOTICE.md
index 798704f3..f72ecdd0 100644
--- a/NOTICE.md
+++ b/NOTICE.md
@@ -1,4 +1,4 @@
-QPDF is copyright (c) 2005-2023 Jay Berkenbilt
+QPDF is copyright (c) 2005-2024 Jay Berkenbilt
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
 
diff --git a/README-maintainer.md b/README-maintainer.md
index 1230249e..a248918b 100644
--- a/README-maintainer.md
+++ b/README-maintainer.md
@@ -439,7 +439,7 @@ When done, the following should happen:
   * debian package -- search for copyright.*berkenbilt in debian/copyright
   * qtest-driver, TestDriver.pm in qtest source
 
-  Copyright last updated: 2023.
+  Copyright last updated: 2024.
 
 * Take a look at "External Libraries" in TODO to see if we need to
   make any changes. There is still some automation work left to do, so
diff --git a/README.md b/README.md
index 2b501498..07e1ee03 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ The public key used to sign qpdf source distributions has fingerprint `C2C9 6B10
 
 # Copyright, License
 
-QPDF is copyright (c) 2005-2023 Jay Berkenbilt
+QPDF is copyright (c) 2005-2024 Jay Berkenbilt
 
 Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
 
diff --git a/appimage/build-appimage b/appimage/build-appimage
index f970b7df..0c6ba6bf 100755
--- a/appimage/build-appimage
+++ b/appimage/build-appimage
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright (c) 2019-2023 Jay Berkenbilt and Kurt Pfeifle
+# Copyright (c) 2019-2024 Jay Berkenbilt and Kurt Pfeifle
 #
 # This script is used to build an 'AppImage' from GitHub sources of
 # QPDF (see https://appimage.org/). It is used in CI, but it also
diff --git a/appimage/qpdf.appdata.xml b/appimage/qpdf.appdata.xml
index 77a24eb8..0a194b59 100644
--- a/appimage/qpdf.appdata.xml
+++ b/appimage/qpdf.appdata.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Copyright 2005-2023 Jay Berkenbilt -->
+<!-- Copyright 2005-2024 Jay Berkenbilt -->
 <component>
 	<id>org.QPDF.qpdf.desktop</id>
 	<metadata_license>MIT</metadata_license>
diff --git a/include/qpdf/Buffer.hh b/include/qpdf/Buffer.hh
index d0e6eda0..fa81e59d 100644
--- a/include/qpdf/Buffer.hh
+++ b/include/qpdf/Buffer.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/BufferInputSource.hh b/include/qpdf/BufferInputSource.hh
index bd63f788..b13c7bd9 100644
--- a/include/qpdf/BufferInputSource.hh
+++ b/include/qpdf/BufferInputSource.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/ClosedFileInputSource.hh b/include/qpdf/ClosedFileInputSource.hh
index 1a6a9a0b..a7aea23c 100644
--- a/include/qpdf/ClosedFileInputSource.hh
+++ b/include/qpdf/ClosedFileInputSource.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Constants.h b/include/qpdf/Constants.h
index 74c9aeac..24f7dc3a 100644
--- a/include/qpdf/Constants.h
+++ b/include/qpdf/Constants.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2023 Jay Berkenbilt
+/* Copyright (c) 2005-2024 Jay Berkenbilt
  *
  * This file is part of qpdf.
  *
diff --git a/include/qpdf/DLL.h b/include/qpdf/DLL.h
index 82c52782..03102ec4 100644
--- a/include/qpdf/DLL.h
+++ b/include/qpdf/DLL.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2023 Jay Berkenbilt
+/* Copyright (c) 2005-2024 Jay Berkenbilt
  *
  * This file is part of qpdf.
  *
diff --git a/include/qpdf/FileInputSource.hh b/include/qpdf/FileInputSource.hh
index ed9ae6c6..8588582b 100644
--- a/include/qpdf/FileInputSource.hh
+++ b/include/qpdf/FileInputSource.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/InputSource.hh b/include/qpdf/InputSource.hh
index c1785a25..7a5e8ec8 100644
--- a/include/qpdf/InputSource.hh
+++ b/include/qpdf/InputSource.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/JSON.hh b/include/qpdf/JSON.hh
index d05a82fb..81abe89c 100644
--- a/include/qpdf/JSON.hh
+++ b/include/qpdf/JSON.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/PDFVersion.hh b/include/qpdf/PDFVersion.hh
index ed072c7a..7f812ae4 100644
--- a/include/qpdf/PDFVersion.hh
+++ b/include/qpdf/PDFVersion.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pipeline.hh b/include/qpdf/Pipeline.hh
index bd5a7826..50b5fa61 100644
--- a/include/qpdf/Pipeline.hh
+++ b/include/qpdf/Pipeline.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_Buffer.hh b/include/qpdf/Pl_Buffer.hh
index 5def8b4f..d02140d4 100644
--- a/include/qpdf/Pl_Buffer.hh
+++ b/include/qpdf/Pl_Buffer.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_Concatenate.hh b/include/qpdf/Pl_Concatenate.hh
index bee1bcf3..58d23177 100644
--- a/include/qpdf/Pl_Concatenate.hh
+++ b/include/qpdf/Pl_Concatenate.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_Count.hh b/include/qpdf/Pl_Count.hh
index 3601f8de..b95ad040 100644
--- a/include/qpdf/Pl_Count.hh
+++ b/include/qpdf/Pl_Count.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_DCT.hh b/include/qpdf/Pl_DCT.hh
index b7e6b1e3..0f5466f6 100644
--- a/include/qpdf/Pl_DCT.hh
+++ b/include/qpdf/Pl_DCT.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_Discard.hh b/include/qpdf/Pl_Discard.hh
index 2eddf13d..0e2aa96f 100644
--- a/include/qpdf/Pl_Discard.hh
+++ b/include/qpdf/Pl_Discard.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_Flate.hh b/include/qpdf/Pl_Flate.hh
index 14009b2a..41ae7e4a 100644
--- a/include/qpdf/Pl_Flate.hh
+++ b/include/qpdf/Pl_Flate.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_Function.hh b/include/qpdf/Pl_Function.hh
index afd421a3..9dc0b564 100644
--- a/include/qpdf/Pl_Function.hh
+++ b/include/qpdf/Pl_Function.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_OStream.hh b/include/qpdf/Pl_OStream.hh
index 9aeaac4d..3f0e8e61 100644
--- a/include/qpdf/Pl_OStream.hh
+++ b/include/qpdf/Pl_OStream.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_QPDFTokenizer.hh b/include/qpdf/Pl_QPDFTokenizer.hh
index 79cbda7b..79ba8435 100644
--- a/include/qpdf/Pl_QPDFTokenizer.hh
+++ b/include/qpdf/Pl_QPDFTokenizer.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_RunLength.hh b/include/qpdf/Pl_RunLength.hh
index e04bce2d..5f5c7ab3 100644
--- a/include/qpdf/Pl_RunLength.hh
+++ b/include/qpdf/Pl_RunLength.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_StdioFile.hh b/include/qpdf/Pl_StdioFile.hh
index fb994459..3be92cf5 100644
--- a/include/qpdf/Pl_StdioFile.hh
+++ b/include/qpdf/Pl_StdioFile.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Pl_String.hh b/include/qpdf/Pl_String.hh
index dc720c90..4be9176c 100644
--- a/include/qpdf/Pl_String.hh
+++ b/include/qpdf/Pl_String.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/PointerHolder.hh b/include/qpdf/PointerHolder.hh
index 476abac2..388d1c6f 100644
--- a/include/qpdf/PointerHolder.hh
+++ b/include/qpdf/PointerHolder.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QIntC.hh b/include/qpdf/QIntC.hh
index 8db0a89d..60eb737d 100644
--- a/include/qpdf/QIntC.hh
+++ b/include/qpdf/QIntC.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDF.hh b/include/qpdf/QPDF.hh
index 615803d3..5ae01770 100644
--- a/include/qpdf/QPDF.hh
+++ b/include/qpdf/QPDF.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFAcroFormDocumentHelper.hh b/include/qpdf/QPDFAcroFormDocumentHelper.hh
index 72078524..d773511e 100644
--- a/include/qpdf/QPDFAcroFormDocumentHelper.hh
+++ b/include/qpdf/QPDFAcroFormDocumentHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFAnnotationObjectHelper.hh b/include/qpdf/QPDFAnnotationObjectHelper.hh
index 69ec77b4..019b944f 100644
--- a/include/qpdf/QPDFAnnotationObjectHelper.hh
+++ b/include/qpdf/QPDFAnnotationObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFCryptoImpl.hh b/include/qpdf/QPDFCryptoImpl.hh
index 522b72aa..8babcf11 100644
--- a/include/qpdf/QPDFCryptoImpl.hh
+++ b/include/qpdf/QPDFCryptoImpl.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFCryptoProvider.hh b/include/qpdf/QPDFCryptoProvider.hh
index f1f7801c..0e75bfed 100644
--- a/include/qpdf/QPDFCryptoProvider.hh
+++ b/include/qpdf/QPDFCryptoProvider.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFDocumentHelper.hh b/include/qpdf/QPDFDocumentHelper.hh
index 1cd0a2e0..fc935655 100644
--- a/include/qpdf/QPDFDocumentHelper.hh
+++ b/include/qpdf/QPDFDocumentHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFEFStreamObjectHelper.hh b/include/qpdf/QPDFEFStreamObjectHelper.hh
index 2d55cca7..3578aec3 100644
--- a/include/qpdf/QPDFEFStreamObjectHelper.hh
+++ b/include/qpdf/QPDFEFStreamObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFEmbeddedFileDocumentHelper.hh b/include/qpdf/QPDFEmbeddedFileDocumentHelper.hh
index b4633369..21ac2bc4 100644
--- a/include/qpdf/QPDFEmbeddedFileDocumentHelper.hh
+++ b/include/qpdf/QPDFEmbeddedFileDocumentHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFExc.hh b/include/qpdf/QPDFExc.hh
index daa52a47..1d1b30dd 100644
--- a/include/qpdf/QPDFExc.hh
+++ b/include/qpdf/QPDFExc.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFFileSpecObjectHelper.hh b/include/qpdf/QPDFFileSpecObjectHelper.hh
index 6001f09d..f341df10 100644
--- a/include/qpdf/QPDFFileSpecObjectHelper.hh
+++ b/include/qpdf/QPDFFileSpecObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFFormFieldObjectHelper.hh b/include/qpdf/QPDFFormFieldObjectHelper.hh
index 156ccc64..f31bb7bd 100644
--- a/include/qpdf/QPDFFormFieldObjectHelper.hh
+++ b/include/qpdf/QPDFFormFieldObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFJob.hh b/include/qpdf/QPDFJob.hh
index b9c8ba50..d7f14957 100644
--- a/include/qpdf/QPDFJob.hh
+++ b/include/qpdf/QPDFJob.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFLogger.hh b/include/qpdf/QPDFLogger.hh
index 0b5b6186..e3769653 100644
--- a/include/qpdf/QPDFLogger.hh
+++ b/include/qpdf/QPDFLogger.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFMatrix.hh b/include/qpdf/QPDFMatrix.hh
index 7abe6ec6..7f31ac25 100644
--- a/include/qpdf/QPDFMatrix.hh
+++ b/include/qpdf/QPDFMatrix.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFNameTreeObjectHelper.hh b/include/qpdf/QPDFNameTreeObjectHelper.hh
index 1d344a6c..752fe682 100644
--- a/include/qpdf/QPDFNameTreeObjectHelper.hh
+++ b/include/qpdf/QPDFNameTreeObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFNumberTreeObjectHelper.hh b/include/qpdf/QPDFNumberTreeObjectHelper.hh
index fe55a28f..abc06065 100644
--- a/include/qpdf/QPDFNumberTreeObjectHelper.hh
+++ b/include/qpdf/QPDFNumberTreeObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFObjGen.hh b/include/qpdf/QPDFObjGen.hh
index 60c397e4..400760eb 100644
--- a/include/qpdf/QPDFObjGen.hh
+++ b/include/qpdf/QPDFObjGen.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFObject.hh b/include/qpdf/QPDFObject.hh
index 85ac110e..679433bd 100644
--- a/include/qpdf/QPDFObject.hh
+++ b/include/qpdf/QPDFObject.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFObjectHandle.hh b/include/qpdf/QPDFObjectHandle.hh
index 270c28bb..b2835495 100644
--- a/include/qpdf/QPDFObjectHandle.hh
+++ b/include/qpdf/QPDFObjectHandle.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFObjectHelper.hh b/include/qpdf/QPDFObjectHelper.hh
index 953ee1f1..dff9386f 100644
--- a/include/qpdf/QPDFObjectHelper.hh
+++ b/include/qpdf/QPDFObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFOutlineDocumentHelper.hh b/include/qpdf/QPDFOutlineDocumentHelper.hh
index 1d249969..4f93c714 100644
--- a/include/qpdf/QPDFOutlineDocumentHelper.hh
+++ b/include/qpdf/QPDFOutlineDocumentHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFOutlineObjectHelper.hh b/include/qpdf/QPDFOutlineObjectHelper.hh
index 6b42f509..f119f35a 100644
--- a/include/qpdf/QPDFOutlineObjectHelper.hh
+++ b/include/qpdf/QPDFOutlineObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFPageDocumentHelper.hh b/include/qpdf/QPDFPageDocumentHelper.hh
index b408fdd2..6c652f8f 100644
--- a/include/qpdf/QPDFPageDocumentHelper.hh
+++ b/include/qpdf/QPDFPageDocumentHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFPageLabelDocumentHelper.hh b/include/qpdf/QPDFPageLabelDocumentHelper.hh
index 741329cb..eb610544 100644
--- a/include/qpdf/QPDFPageLabelDocumentHelper.hh
+++ b/include/qpdf/QPDFPageLabelDocumentHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFPageObjectHelper.hh b/include/qpdf/QPDFPageObjectHelper.hh
index a5be1dee..bd7dd850 100644
--- a/include/qpdf/QPDFPageObjectHelper.hh
+++ b/include/qpdf/QPDFPageObjectHelper.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFStreamFilter.hh b/include/qpdf/QPDFStreamFilter.hh
index 4664f213..2a7d65b3 100644
--- a/include/qpdf/QPDFStreamFilter.hh
+++ b/include/qpdf/QPDFStreamFilter.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFSystemError.hh b/include/qpdf/QPDFSystemError.hh
index cdc3e386..ef8c8c1a 100644
--- a/include/qpdf/QPDFSystemError.hh
+++ b/include/qpdf/QPDFSystemError.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFTokenizer.hh b/include/qpdf/QPDFTokenizer.hh
index d8bc43b6..15f7a773 100644
--- a/include/qpdf/QPDFTokenizer.hh
+++ b/include/qpdf/QPDFTokenizer.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFUsage.hh b/include/qpdf/QPDFUsage.hh
index 16fbb867..923bd109 100644
--- a/include/qpdf/QPDFUsage.hh
+++ b/include/qpdf/QPDFUsage.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFWriter.hh b/include/qpdf/QPDFWriter.hh
index 6bbe69e4..95291974 100644
--- a/include/qpdf/QPDFWriter.hh
+++ b/include/qpdf/QPDFWriter.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QPDFXRefEntry.hh b/include/qpdf/QPDFXRefEntry.hh
index 0593c02d..cc2e9b56 100644
--- a/include/qpdf/QPDFXRefEntry.hh
+++ b/include/qpdf/QPDFXRefEntry.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QTC.hh b/include/qpdf/QTC.hh
index 030d4d97..7d39d01a 100644
--- a/include/qpdf/QTC.hh
+++ b/include/qpdf/QTC.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/QUtil.hh b/include/qpdf/QUtil.hh
index 4259922f..649a14aa 100644
--- a/include/qpdf/QUtil.hh
+++ b/include/qpdf/QUtil.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/RandomDataProvider.hh b/include/qpdf/RandomDataProvider.hh
index d40bd1f1..0eedc446 100644
--- a/include/qpdf/RandomDataProvider.hh
+++ b/include/qpdf/RandomDataProvider.hh
@@ -1,4 +1,4 @@
-// Copyright (c) 2005-2023 Jay Berkenbilt
+// Copyright (c) 2005-2024 Jay Berkenbilt
 //
 // This file is part of qpdf.
 //
diff --git a/include/qpdf/Types.h b/include/qpdf/Types.h
index fd994fb3..4afb76ff 100644
--- a/include/qpdf/Types.h
+++ b/include/qpdf/Types.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2023 Jay Berkenbilt
+/* Copyright (c) 2005-2024 Jay Berkenbilt
  *
  * This file is part of qpdf.
  *
diff --git a/include/qpdf/qpdf-c.h b/include/qpdf/qpdf-c.h
index f989ba15..fba952f2 100644
--- a/include/qpdf/qpdf-c.h
+++ b/include/qpdf/qpdf-c.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2023 Jay Berkenbilt
+/* Copyright (c) 2005-2024 Jay Berkenbilt
  *
  * This file is part of qpdf.
  *
diff --git a/include/qpdf/qpdfjob-c.h b/include/qpdf/qpdfjob-c.h
index 5450d3d0..ffe659a8 100644
--- a/include/qpdf/qpdfjob-c.h
+++ b/include/qpdf/qpdfjob-c.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2023 Jay Berkenbilt
+/* Copyright (c) 2005-2024 Jay Berkenbilt
  *
  * This file is part of qpdf.
  *
diff --git a/include/qpdf/qpdflogger-c.h b/include/qpdf/qpdflogger-c.h
index ce3d87a4..f8e5a353 100644
--- a/include/qpdf/qpdflogger-c.h
+++ b/include/qpdf/qpdflogger-c.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2005-2023 Jay Berkenbilt
+/* Copyright (c) 2005-2024 Jay Berkenbilt
  *
  * This file is part of qpdf.
  *
diff --git a/libqpdf/QPDFJob_argv.cc b/libqpdf/QPDFJob_argv.cc
index 3875474b..eadf9a33 100644
--- a/libqpdf/QPDFJob_argv.cc
+++ b/libqpdf/QPDFJob_argv.cc
@@ -114,7 +114,7 @@ ArgParser::argCopyright()
         << this->ap.getProgname()
         << " version " << QPDF::QPDFVersion() << "\n"
         << "\n"
-        << "Copyright (c) 2005-2023 Jay Berkenbilt\n"
+        << "Copyright (c) 2005-2024 Jay Berkenbilt\n"
         << "QPDF is licensed under the Apache License, Version 2.0 (the \"License\");\n"
         << "you may not use this file except in compliance with the License.\n"
         << "You may obtain a copy of the License at\n"
diff --git a/manual/conf.py b/manual/conf.py
index 9d4eb5ec..241c7fc8 100644
--- a/manual/conf.py
+++ b/manual/conf.py
@@ -13,7 +13,7 @@ import sys
 sys.path.append(os.path.abspath("./_ext"))
 
 project = 'QPDF'
-copyright = '2005-2023, Jay Berkenbilt'
+copyright = '2005-2024, Jay Berkenbilt'
 author = 'Jay Berkenbilt'
 here = os.path.dirname(os.path.realpath(__file__))
 with open(f'{here}/../CMakeLists.txt') as f:
diff --git a/qtest/bin/qtest-driver b/qtest/bin/qtest-driver
index 0bef9681..22594ecf 100755
--- a/qtest/bin/qtest-driver
+++ b/qtest/bin/qtest-driver
@@ -2,7 +2,7 @@
 #
 # This file is part of qtest.
 #
-# Copyright 1993-2023, Jay Berkenbilt
+# Copyright 1993-2024, Jay Berkenbilt
 #
 # QTest is distributed under the terms of version 2.0 of the Artistic
 # license which may be found in the source distribution.
diff --git a/qtest/module/TestDriver.pm b/qtest/module/TestDriver.pm
index a6a5e1c4..7d5d28bf 100644
--- a/qtest/module/TestDriver.pm
+++ b/qtest/module/TestDriver.pm
@@ -2,7 +2,7 @@
 #
 # This file is part of qtest.
 #
-# Copyright 1993-2023, Jay Berkenbilt
+# Copyright 1993-2024, Jay Berkenbilt
 #
 # QTest is distributed under the terms of version 2.0 of the Artistic
 # license which may be found in the source distribution.