diff --git a/client/client.go b/client/client.go
index 17f4c86..eec21c3 100644
--- a/client/client.go
+++ b/client/client.go
@@ -1,4 +1,4 @@
-// Copyright (C) 2021-2024 Shizun Ge
+// Copyright (C) 2021-2026 Shizun Ge
 //
 // 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/geoip/country.go b/geoip/country.go
index ebe6ad0..ee3836e 100644
--- a/geoip/country.go
+++ b/geoip/country.go
@@ -1,4 +1,4 @@
-// Copyright (C) 2023-2024 Shizun Ge
+// Copyright (C) 2023-2026 Shizun Ge
 //
 // 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/geoip/geoip.go b/geoip/geoip.go
index 6701197..bebb430 100644
--- a/geoip/geoip.go
+++ b/geoip/geoip.go
@@ -1,4 +1,4 @@
-// Copyright (C) 2021-2024 Shizun Ge
+// Copyright (C) 2021-2026 Shizun Ge
 //
 // 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/main.go b/main.go
index 94e165c..25e6d1b 100644
--- a/main.go
+++ b/main.go
@@ -1,4 +1,4 @@
-// Copyright (C) 2021-2024 Shizun Ge
+// Copyright (C) 2021-2026 Shizun Ge
 //
 // 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/metrics/metrics.go b/metrics/metrics.go
index 65b1d0f..0befc6a 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -1,4 +1,4 @@
-// Copyright (C) 2024 Shizun Ge
+// Copyright (C) 2024-2026 Shizun Ge
 //
 // 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