diff --git a/experimental/ast/commas.go b/experimental/ast/commas.go
index c8eac794..c3f7db70 100644
--- a/experimental/ast/commas.go
+++ b/experimental/ast/commas.go
@@ -1,4 +1,4 @@
-// Copyright 2020-2024 Buf Technologies, Inc.
+// Copyright 2020-2025 Buf Technologies, Inc.
 //
 // 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/experimental/seq/seq.go b/experimental/seq/seq.go
index f432a6c2..7aa736ae 100644
--- a/experimental/seq/seq.go
+++ b/experimental/seq/seq.go
@@ -1,4 +1,4 @@
-// Copyright 2020-2024 Buf Technologies, Inc.
+// Copyright 2020-2025 Buf Technologies, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -55,7 +55,7 @@ type Inserter[T any] interface {
 
 	// Delete deletes the element at the given index.
 	//
-	// Should panic if idx < 0 or idx > Len().
+	// Should panic if idx < 0 or idx => Len().
 	Delete(idx int)
 }
 
diff --git a/experimental/seq/slice.go b/experimental/seq/slice.go
index f9056f18..f606ef8d 100644
--- a/experimental/seq/slice.go
+++ b/experimental/seq/slice.go
@@ -1,4 +1,4 @@
-// Copyright 2020-2024 Buf Technologies, Inc.
+// Copyright 2020-2025 Buf Technologies, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.