diff --git a/src/main/java/org/codelibs/fess/ds/csv/CsvDataStore.java b/src/main/java/org/codelibs/fess/ds/csv/CsvDataStore.java
index e4897c1..65ba8dd 100644
--- a/src/main/java/org/codelibs/fess/ds/csv/CsvDataStore.java
+++ b/src/main/java/org/codelibs/fess/ds/csv/CsvDataStore.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 CodeLibs Project and the Others.
+ * Copyright 2012-2024 CodeLibs Project and the Others.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/main/java/org/codelibs/fess/ds/csv/CsvListDataStore.java b/src/main/java/org/codelibs/fess/ds/csv/CsvListDataStore.java
index 9d11abb..4ebdd6c 100644
--- a/src/main/java/org/codelibs/fess/ds/csv/CsvListDataStore.java
+++ b/src/main/java/org/codelibs/fess/ds/csv/CsvListDataStore.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 CodeLibs Project and the Others.
+ * Copyright 2012-2024 CodeLibs Project and the Others.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/test/java/org/codelibs/fess/ds/csv/CsvDataStoreTest.java b/src/test/java/org/codelibs/fess/ds/csv/CsvDataStoreTest.java
index ae2252b..bf96e82 100644
--- a/src/test/java/org/codelibs/fess/ds/csv/CsvDataStoreTest.java
+++ b/src/test/java/org/codelibs/fess/ds/csv/CsvDataStoreTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 CodeLibs Project and the Others.
+ * Copyright 2012-2024 CodeLibs Project and the Others.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/test/java/org/codelibs/fess/ds/csv/CsvListDataStoreTest.java b/src/test/java/org/codelibs/fess/ds/csv/CsvListDataStoreTest.java
index 8fa9e17..096bd0c 100644
--- a/src/test/java/org/codelibs/fess/ds/csv/CsvListDataStoreTest.java
+++ b/src/test/java/org/codelibs/fess/ds/csv/CsvListDataStoreTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 CodeLibs Project and the Others.
+ * Copyright 2012-2024 CodeLibs Project and the Others.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.