diff --git a/LICENSE b/LICENSE
index f8a6d8c..995cf8a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2018 Shinya Yamaguchi
+Copyright (c) 2018-2020 Shinya Yamaguchi
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
diff --git a/haskell-stack-trace-plugin.cabal b/haskell-stack-trace-plugin.cabal
index 8162357..16eb097 100644
--- a/haskell-stack-trace-plugin.cabal
+++ b/haskell-stack-trace-plugin.cabal
@@ -8,7 +8,7 @@ license:             MIT
 license-file:        LICENSE
 author:              Shinya Yamaguchi
 maintainer:          ingronze@gmail.com
-copyright:           2018 Shinya Yamaguchi
+copyright:           2018-2020 Shinya Yamaguchi
 category:            Compiler Plugin, Development, Debug
 build-type:          Simple
 extra-source-files:  CHANGELOG.md, Readme.md