diff --git a/LICENCE b/LICENCE
index acac6f2..aead667 100644
--- a/LICENCE
+++ b/LICENCE
@@ -1,9 +1,9 @@
-This software is copyright (c) 2004-2021 Simon Tatham.
+This software is copyright (c) 2004-2023 Simon Tatham.
 
 Portions copyright Richard Boulton, James Harvey, Mike Pinna, Jonas
 Kölker, Dariusz Olszewski, Michael Schierl, Lambros Lambrou, Bernd
 Schmidt, Steffen Bauer, Lennard Sprong, Rogier Goossens, Michael
-Quevillon, Asher Gordon and Didi Kohen.
+Quevillon, Asher Gordon, Didi Kohen and Ben Harris.
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation files
diff --git a/osx/Info.plist b/osx/Info.plist
index 9c1ceef..b66fd9b 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) 2004-2021 Simon Tatham</string>
+	<string>This software is copyright (c) 2004-2023 Simon Tatham</string>
 	<key>NSHighResolutionCapable</key>
 	<true/>
 </dict>
diff --git a/puzzles.but b/puzzles.but
index bb57ca7..c75e612 100644
--- a/puzzles.but
+++ b/puzzles.but
@@ -3428,12 +3428,12 @@ 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} 2004-2021 Simon Tatham.
+This software is \i{copyright} 2004-2023 Simon Tatham.
 
 Portions copyright Richard Boulton, James Harvey, Mike Pinna, Jonas
 K\u00F6{oe}lker, Dariusz Olszewski, Michael Schierl, Lambros Lambrou,
 Bernd Schmidt, Steffen Bauer, Lennard Sprong, Rogier Goossens, Michael
-Quevillon, Asher Gordon and Didi Kohen.
+Quevillon, Asher Gordon, Didi Kohen, and Ben Harris.
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation files