diff --git a/LICENCE b/LICENCE
index aead667..d33dae8 100644
--- a/LICENCE
+++ b/LICENCE
@@ -1,4 +1,4 @@
-This software is copyright (c) 2004-2023 Simon Tatham.
+This software is copyright (c) 2004-2024 Simon Tatham.
 
 Portions copyright Richard Boulton, James Harvey, Mike Pinna, Jonas
 Kölker, Dariusz Olszewski, Michael Schierl, Lambros Lambrou, Bernd
diff --git a/osx/Info.plist b/osx/Info.plist
index b66fd9b..f3ae47a 100644
--- a/osx/Info.plist
+++ b/osx/Info.plist
@@ -29,7 +29,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>NSHumanReadableCopyright</key>
-	<string>This software is copyright (c) 2004-2023 Simon Tatham</string>
+	<string>This software is copyright (c) 2004-2024 Simon Tatham</string>
 	<key>NSHighResolutionCapable</key>
 	<true/>
 </dict>
diff --git a/puzzles.but b/puzzles.but
index a48856a..9ade43e 100644
--- a/puzzles.but
+++ b/puzzles.but
@@ -36,7 +36,7 @@
 
 This is a collection of small one-player puzzle games.
 
-\copyright This manual is copyright 2004-2023 Simon Tatham. All rights
+\copyright This manual is copyright 2004-2024 Simon Tatham. All rights
 reserved. You may distribute this documentation under the MIT licence.
 See \k{licence} for the licence text in full.
 
@@ -3586,7 +3586,7 @@ so it's not recommended for boards larger than, say, 30\times\.30.
 
 \A{licence} \I{MIT licence}\ii{Licence}
 
-This software is \i{copyright} 2004-2023 Simon Tatham.
+This software is \i{copyright} 2004-2024 Simon Tatham.
 
 Portions copyright Richard Boulton, James Harvey, Mike Pinna, Jonas
 K\u00F6{oe}lker, Dariusz Olszewski, Michael Schierl, Lambros Lambrou,