main.go     | 4 ++--
 progress.go | 2 +-
 walk.go     | 2 +-

diff --git a/main.go b/main.go
index b05deb29711ed9e57e72fab65b87be103eb283d7..1bb437d05da0b8fa54ea480bcb2f543bdf89c7e7 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,6 @@
 /*
 sgodup -- File deduplication utility
-Copyright (C) 2020-2022 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2020-2023 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -132,7 +132,7 @@
 func main() {
 	flag.Usage = func() {
 		fmt.Fprintf(os.Stderr, `sgodup -- file deduplication utility
-Copyright (C) 2020-2022 Sergey Matveev
+Copyright (C) 2020-2023 Sergey Matveev
 License GPLv3: GNU GPL version 3 <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.
diff --git a/progress.go b/progress.go
index 56b590da16aad0ef803c250db259ec5ffad3fec0..4faf8a2e97829cc0d3536bc7d6779efd9912a39d 100644
--- a/progress.go
+++ b/progress.go
@@ -1,6 +1,6 @@
 /*
 sgodup -- File deduplication utility
-Copyright (C) 2020-2022 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2020-2023 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/walk.go b/walk.go
index 8e4c5bfeaadc4d277360c16a117d5affc3ffbea0..e02195d18e796203827a2d555adb9bcc0291bc62 100644
--- a/walk.go
+++ b/walk.go
@@ -1,6 +1,6 @@
 /*
 sgodup -- File deduplication utility
-Copyright (C) 2020-2022 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2020-2023 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by