diff --git a/.editorconfig b/.editorconfig
index 5bbb817..4433ed4 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -145,7 +145,7 @@ dotnet_naming_symbols.all_members.applicable_kinds = *
 
 dotnet_naming_style.pascal_case_style.capitalization = pascal_case
 
-file_header_template = Copyright (c) 2021-$CURRENT_YEAR$ Koji Hasegawa.\nThis software is released under the MIT License.
+file_header_template = Copyright (c) 2021-${CurrentDate.Year} Koji Hasegawa.\nThis software is released under the MIT License.
 
 # RS0016: Only enable if API files are present
 dotnet_public_api_analyzer.require_api_files = true
diff --git a/LICENSE.md b/LICENSE.md
index 5ebe940..d80dcbe 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021-2023 Koji Hasegawa
+Copyright (c) 2021-2024 Koji Hasegawa
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal