diff --git a/McBopomofoTests/KeyHandlerBopomofoTests.swift b/McBopomofoTests/KeyHandlerBopomofoTests.swift
index 9b6bf049..a92407a3 100644
--- a/McBopomofoTests/KeyHandlerBopomofoTests.swift
+++ b/McBopomofoTests/KeyHandlerBopomofoTests.swift
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 and onwards The McBopomofo Authors.
+// Copyright (c) 2022 and onwards The McBopomofo Authors.
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation
diff --git a/McBopomofoTests/KeyHandlerPlainBopomofoTests.swift b/McBopomofoTests/KeyHandlerPlainBopomofoTests.swift
index a7b579f9..a69192e4 100644
--- a/McBopomofoTests/KeyHandlerPlainBopomofoTests.swift
+++ b/McBopomofoTests/KeyHandlerPlainBopomofoTests.swift
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 and onwards The McBopomofo Authors.
+// Copyright (c) 2022 and onwards The McBopomofo Authors.
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation
diff --git a/McBopomofoTests/PreferencesTests.swift b/McBopomofoTests/PreferencesTests.swift
index 522d3f4e..1da333ad 100644
--- a/McBopomofoTests/PreferencesTests.swift
+++ b/McBopomofoTests/PreferencesTests.swift
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 and onwards The McBopomofo Authors.
+// Copyright (c) 2022 and onwards The McBopomofo Authors.
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation
diff --git a/McBopomofoTests/VersionUpdateTests.swift b/McBopomofoTests/VersionUpdateTests.swift
index 735513a6..ade7ad1e 100644
--- a/McBopomofoTests/VersionUpdateTests.swift
+++ b/McBopomofoTests/VersionUpdateTests.swift
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 and onwards The McBopomofo Authors.
+// Copyright (c) 2022 and onwards The McBopomofo Authors.
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation
diff --git a/Source/KeyHandler.h b/Source/KeyHandler.h
index c537b7f4..34d3ed2c 100644
--- a/Source/KeyHandler.h
+++ b/Source/KeyHandler.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 and onwards The McBopomofo Authors.
+// Copyright (c) 2022 and onwards The McBopomofo Authors.
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation
diff --git a/Source/KeyHandler.mm b/Source/KeyHandler.mm
index 2ec6a77f..7820d435 100644
--- a/Source/KeyHandler.mm
+++ b/Source/KeyHandler.mm
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 and onwards The McBopomofo Authors.
+// Copyright (c) 2022 and onwards The McBopomofo Authors.
 //
 // Permission is hereby granted, free of charge, to any person
 // obtaining a copy of this software and associated documentation