diff --git a/dev/lib/dexie.js b/dev/lib/dexie.js
index 81a62b28c3..e41e3b22d1 100644
--- a/dev/lib/dexie.js
+++ b/dev/lib/dexie.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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/dev/lib/handlebars.js b/dev/lib/handlebars.js
index 5b57efdd63..29507e55b9 100644
--- a/dev/lib/handlebars.js
+++ b/dev/lib/handlebars.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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/dev/lib/parse5.js b/dev/lib/parse5.js
index c7b2c83893..b569973019 100644
--- a/dev/lib/parse5.js
+++ b/dev/lib/parse5.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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/dev/lib/ucs2length.js b/dev/lib/ucs2length.js
index 3b370493a4..b06293567c 100644
--- a/dev/lib/ucs2length.js
+++ b/dev/lib/ucs2length.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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/dev/lib/wanakana.js b/dev/lib/wanakana.js
index dca707296e..1302fc517a 100644
--- a/dev/lib/wanakana.js
+++ b/dev/lib/wanakana.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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/dev/lib/z-worker.js b/dev/lib/z-worker.js
index f6a95ed3b1..43809bf508 100644
--- a/dev/lib/z-worker.js
+++ b/dev/lib/z-worker.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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/dev/lib/zip.js b/dev/lib/zip.js
index b6e8545191..3ee8a7be03 100644
--- a/dev/lib/zip.js
+++ b/dev/lib/zip.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2023  Yomitan Authors
+ * Copyright (C) 2024  Yomitan Authors
  *
  * 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