diff --git a/README.md b/README.md
index 71309ef2..aa94afe0 100644
--- a/README.md
+++ b/README.md
@@ -1350,7 +1350,7 @@ Include `httplib.h` before `Windows.h` or include `Windows.h` by defining `WIN32
 License
 -------
 
-MIT license (© 2025 Yuji Hirose)
+MIT license (© 2026 Yuji Hirose)
 
 Special Thanks To
 -----------------
diff --git a/docker/main.cc b/docker/main.cc
index edc7093b..69279bfb 100644
--- a/docker/main.cc
+++ b/docker/main.cc
@@ -1,7 +1,7 @@
 //
 //  main.cc
 //
-//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/client.cc b/example/client.cc
index a9b0fc0a..b89bb4c5 100644
--- a/example/client.cc
+++ b/example/client.cc
@@ -1,7 +1,7 @@
 //
 //  client.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/hello.cc b/example/hello.cc
index 38d25a62..ca0d379c 100644
--- a/example/hello.cc
+++ b/example/hello.cc
@@ -1,7 +1,7 @@
 //
 //  hello.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/redirect.cc b/example/redirect.cc
index b1f39396..e9c04b2b 100644
--- a/example/redirect.cc
+++ b/example/redirect.cc
@@ -1,7 +1,7 @@
 //
 //  redirect.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/server.cc b/example/server.cc
index 1c347f5f..6a800606 100644
--- a/example/server.cc
+++ b/example/server.cc
@@ -1,7 +1,7 @@
 //
 //  sample.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/server_and_client.cc b/example/server_and_client.cc
index 34bf8527..e35a02a5 100644
--- a/example/server_and_client.cc
+++ b/example/server_and_client.cc
@@ -1,7 +1,7 @@
 //
 //  server_and_client.cc
 //
-//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/simplecli.cc b/example/simplecli.cc
index b005e408..a7e41b82 100644
--- a/example/simplecli.cc
+++ b/example/simplecli.cc
@@ -1,7 +1,7 @@
 //
 //  simplecli.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/simplesvr.cc b/example/simplesvr.cc
index e45e3606..bdf2a1c8 100644
--- a/example/simplesvr.cc
+++ b/example/simplesvr.cc
@@ -1,7 +1,7 @@
 //
 //  simplesvr.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/ssecli-stream.cc b/example/ssecli-stream.cc
index 0dd279ad..493a2232 100644
--- a/example/ssecli-stream.cc
+++ b/example/ssecli-stream.cc
@@ -1,7 +1,7 @@
 //
 //  ssecli-stream.cc
 //
-//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 //  SSE (Server-Sent Events) client example using Streaming API
diff --git a/example/ssecli.cc b/example/ssecli.cc
index f7b9ed55..98e26237 100644
--- a/example/ssecli.cc
+++ b/example/ssecli.cc
@@ -1,7 +1,7 @@
 //
 //  ssecli.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/example/upload.cc b/example/upload.cc
index f7a822be..fd34e8f4 100644
--- a/example/upload.cc
+++ b/example/upload.cc
@@ -1,7 +1,7 @@
 //
 //  upload.cc
 //
-//  Copyright (c) 2019 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //
 
diff --git a/httplib.h b/httplib.h
index d7841a16..acb5bc39 100644
--- a/httplib.h
+++ b/httplib.h
@@ -1,7 +1,7 @@
 //
 //  httplib.h
 //
-//  Copyright (c) 2025 Yuji Hirose. All rights reserved.
+//  Copyright (c) 2026 Yuji Hirose. All rights reserved.
 //  MIT License
 //