diff --git a/LICENSE b/LICENSE
index dfe3850..adcb074 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2013 HashiCorp, Inc.
+Copyright IBM Corp. 2013, 2025
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/client.go b/client.go
index da6331e..11b237e 100644
--- a/client.go
+++ b/client.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MIT
 
 package msgpackrpc
diff --git a/codec.go b/codec.go
index c6dfa95..f82fdf8 100644
--- a/codec.go
+++ b/codec.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MIT
 
 package msgpackrpc
diff --git a/codec_test.go b/codec_test.go
index 252a0ba..f9c3ed2 100644
--- a/codec_test.go
+++ b/codec_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MIT
 
 package msgpackrpc
diff --git a/msgpackrpc.go b/msgpackrpc.go
index d649c20..1791897 100644
--- a/msgpackrpc.go
+++ b/msgpackrpc.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MIT
 
 // Package msgpackrpc implements a MessagePack-RPC ClientCodec and ServerCodec
diff --git a/msgpackrpc_test.go b/msgpackrpc_test.go
index 894e8af..3aaf5f5 100644
--- a/msgpackrpc_test.go
+++ b/msgpackrpc_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MIT
 
 package msgpackrpc