diff --git a/Makefile b/Makefile
index 8cd2f480..cb07829b 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ MAKEFLAGS += --no-print-directory
 BIN := .tmp/bin
 export PATH := $(BIN):$(PATH)
 export GOBIN := $(abspath $(BIN))
-COPYRIGHT_YEARS := 2021-2023
+COPYRIGHT_YEARS := 2021-2024
 LICENSE_IGNORE := --ignore /testdata/
 
 .PHONY: help
diff --git a/bench_test.go b/bench_test.go
index 2da22883..974ab389 100644
--- a/bench_test.go
+++ b/bench_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/buffer_pool.go b/buffer_pool.go
index 606b2ab0..8ac68db2 100644
--- a/buffer_pool.go
+++ b/buffer_pool.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/client.go b/client.go
index 84b84c0a..1a7b1d64 100644
--- a/client.go
+++ b/client.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/client_example_test.go b/client_example_test.go
index c85e8d44..05448d50 100644
--- a/client_example_test.go
+++ b/client_example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/client_ext_test.go b/client_ext_test.go
index 00ab4ffb..9dcec272 100644
--- a/client_ext_test.go
+++ b/client_ext_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/client_get_fallback_test.go b/client_get_fallback_test.go
index 3c35eaaf..b6d3ef84 100644
--- a/client_get_fallback_test.go
+++ b/client_get_fallback_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/client_stream.go b/client_stream.go
index d3a8948b..886fe7c3 100644
--- a/client_stream.go
+++ b/client_stream.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/client_stream_test.go b/client_stream_test.go
index e2b91598..a812caa1 100644
--- a/client_stream_test.go
+++ b/client_stream_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/cmd/protoc-gen-connect-go/main.go b/cmd/protoc-gen-connect-go/main.go
index 6f626f35..24f137aa 100644
--- a/cmd/protoc-gen-connect-go/main.go
+++ b/cmd/protoc-gen-connect-go/main.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/code.go b/code.go
index 821d5727..126fae43 100644
--- a/code.go
+++ b/code.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/code_test.go b/code_test.go
index a7f44504..574bd2db 100644
--- a/code_test.go
+++ b/code_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/codec.go b/codec.go
index 7cd4552a..4e7c3ba9 100644
--- a/codec.go
+++ b/codec.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/codec_test.go b/codec_test.go
index 94c3a2f4..7859be63 100644
--- a/codec_test.go
+++ b/codec_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/compression.go b/compression.go
index 39e4bca7..ee43412b 100644
--- a/compression.go
+++ b/compression.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/compression_test.go b/compression_test.go
index 7db457ad..c6b60b59 100644
--- a/compression_test.go
+++ b/compression_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/connect.go b/connect.go
index 963374d4..50e31a95 100644
--- a/connect.go
+++ b/connect.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/connect_ext_test.go b/connect_ext_test.go
index 6483de76..8cf1e12a 100644
--- a/connect_ext_test.go
+++ b/connect_ext_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/duplex_http_call.go b/duplex_http_call.go
index 5833b39c..6f496549 100644
--- a/duplex_http_call.go
+++ b/duplex_http_call.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/envelope.go b/envelope.go
index c9f67b36..b6898ff0 100644
--- a/envelope.go
+++ b/envelope.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/envelope_test.go b/envelope_test.go
index f153b8c3..2d9cb3cd 100644
--- a/envelope_test.go
+++ b/envelope_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/error.go b/error.go
index ea080e3d..4c57aade 100644
--- a/error.go
+++ b/error.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/error_example_test.go b/error_example_test.go
index 28c9ea79..03d19ff7 100644
--- a/error_example_test.go
+++ b/error_example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/error_not_modified_example_test.go b/error_not_modified_example_test.go
index 8464a78f..096528e1 100644
--- a/error_not_modified_example_test.go
+++ b/error_not_modified_example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/error_test.go b/error_test.go
index 5078c2c0..93306a9c 100644
--- a/error_test.go
+++ b/error_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/error_writer.go b/error_writer.go
index c708f426..a7878031 100644
--- a/error_writer.go
+++ b/error_writer.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/error_writer_example_test.go b/error_writer_example_test.go
index 2da0dc6b..6782b133 100644
--- a/error_writer_example_test.go
+++ b/error_writer_example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/example_init_test.go b/example_init_test.go
index 9edf5114..17316f94 100644
--- a/example_init_test.go
+++ b/example_init_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/handler.go b/handler.go
index 0a4ce659..88e80360 100644
--- a/handler.go
+++ b/handler.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/handler_example_test.go b/handler_example_test.go
index ede1f0de..3872354f 100644
--- a/handler_example_test.go
+++ b/handler_example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/handler_ext_test.go b/handler_ext_test.go
index 6d2d225c..b01eedd9 100644
--- a/handler_ext_test.go
+++ b/handler_ext_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/handler_stream.go b/handler_stream.go
index b68f704f..e946163d 100644
--- a/handler_stream.go
+++ b/handler_stream.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/handler_stream_test.go b/handler_stream_test.go
index 6aa0587c..e55253ba 100644
--- a/handler_stream_test.go
+++ b/handler_stream_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/header.go b/header.go
index c751b9ba..218d8192 100644
--- a/header.go
+++ b/header.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/header_test.go b/header_test.go
index 38bc3d93..77c8cfa7 100644
--- a/header_test.go
+++ b/header_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/idempotency_level.go b/idempotency_level.go
index 499da264..46ad7467 100644
--- a/idempotency_level.go
+++ b/idempotency_level.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/interceptor.go b/interceptor.go
index 26603030..8d0beac6 100644
--- a/interceptor.go
+++ b/interceptor.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/interceptor_example_test.go b/interceptor_example_test.go
index 7d7a2542..9eb63fc2 100644
--- a/interceptor_example_test.go
+++ b/interceptor_example_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/interceptor_ext_test.go b/interceptor_ext_test.go
index f7801153..0de54f93 100644
--- a/interceptor_ext_test.go
+++ b/interceptor_ext_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/assert/assert.go b/internal/assert/assert.go
index 59748b23..08a8618f 100644
--- a/internal/assert/assert.go
+++ b/internal/assert/assert.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/assert/assert_test.go b/internal/assert/assert_test.go
index 28174fd6..aaa0a743 100644
--- a/internal/assert/assert_test.go
+++ b/internal/assert/assert_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/conformance/tools.go b/internal/conformance/tools.go
index b3b95661..480e7179 100644
--- a/internal/conformance/tools.go
+++ b/internal/conformance/tools.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connect/collide/v1/collide.pb.go b/internal/gen/connect/collide/v1/collide.pb.go
index a3cba08b..49fd82ec 100644
--- a/internal/gen/connect/collide/v1/collide.pb.go
+++ b/internal/gen/connect/collide/v1/collide.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connect/collide/v1/collidev1connect/collide.connect.go b/internal/gen/connect/collide/v1/collidev1connect/collide.connect.go
index c686fcfc..8821b506 100644
--- a/internal/gen/connect/collide/v1/collidev1connect/collide.connect.go
+++ b/internal/gen/connect/collide/v1/collidev1connect/collide.connect.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connect/import/v1/import.pb.go b/internal/gen/connect/import/v1/import.pb.go
index e2ec2b88..ac89739f 100644
--- a/internal/gen/connect/import/v1/import.pb.go
+++ b/internal/gen/connect/import/v1/import.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connect/import/v1/importv1connect/import.connect.go b/internal/gen/connect/import/v1/importv1connect/import.connect.go
index 1f6ba74d..8a9f2b8d 100644
--- a/internal/gen/connect/import/v1/importv1connect/import.connect.go
+++ b/internal/gen/connect/import/v1/importv1connect/import.connect.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connect/ping/v1/ping.pb.go b/internal/gen/connect/ping/v1/ping.pb.go
index ecea8c10..4d9574e1 100644
--- a/internal/gen/connect/ping/v1/ping.pb.go
+++ b/internal/gen/connect/ping/v1/ping.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connect/ping/v1/pingv1connect/ping.connect.go b/internal/gen/connect/ping/v1/pingv1connect/ping.connect.go
index 56bf4b2c..aa4b917c 100644
--- a/internal/gen/connect/ping/v1/pingv1connect/ping.connect.go
+++ b/internal/gen/connect/ping/v1/pingv1connect/ping.connect.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/gen/connectext/grpc/status/v1/status.pb.go b/internal/gen/connectext/grpc/status/v1/status.pb.go
index 469e73db..f45241f6 100644
--- a/internal/gen/connectext/grpc/status/v1/status.pb.go
+++ b/internal/gen/connectext/grpc/status/v1/status.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/memhttp/listener.go b/internal/memhttp/listener.go
index adec7519..88026ff8 100644
--- a/internal/memhttp/listener.go
+++ b/internal/memhttp/listener.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/memhttp/memhttp.go b/internal/memhttp/memhttp.go
index 67de9935..aad4ffbf 100644
--- a/internal/memhttp/memhttp.go
+++ b/internal/memhttp/memhttp.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/memhttp/memhttp_test.go b/internal/memhttp/memhttp_test.go
index 9218f7ed..5c750669 100644
--- a/internal/memhttp/memhttp_test.go
+++ b/internal/memhttp/memhttp_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/memhttp/memhttptest/http.go b/internal/memhttp/memhttptest/http.go
index f6d90c55..fbfcaf9e 100644
--- a/internal/memhttp/memhttptest/http.go
+++ b/internal/memhttp/memhttptest/http.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/memhttp/option.go b/internal/memhttp/option.go
index b3e972d5..c1cd69d0 100644
--- a/internal/memhttp/option.go
+++ b/internal/memhttp/option.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/proto/connect/collide/v1/collide.proto b/internal/proto/connect/collide/v1/collide.proto
index fd9aad95..f2264804 100644
--- a/internal/proto/connect/collide/v1/collide.proto
+++ b/internal/proto/connect/collide/v1/collide.proto
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/proto/connect/import/v1/import.proto b/internal/proto/connect/import/v1/import.proto
index 4eefcca1..6c066e72 100644
--- a/internal/proto/connect/import/v1/import.proto
+++ b/internal/proto/connect/import/v1/import.proto
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/proto/connect/ping/v1/ping.proto b/internal/proto/connect/ping/v1/ping.proto
index 98682daf..6218aed5 100644
--- a/internal/proto/connect/ping/v1/ping.proto
+++ b/internal/proto/connect/ping/v1/ping.proto
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/internal/proto/connectext/grpc/status/v1/status.proto b/internal/proto/connectext/grpc/status/v1/status.proto
index 6535d0a8..ce71e546 100644
--- a/internal/proto/connectext/grpc/status/v1/status.proto
+++ b/internal/proto/connectext/grpc/status/v1/status.proto
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/option.go b/option.go
index 35256cf5..b41a24a2 100644
--- a/option.go
+++ b/option.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protobuf_util.go b/protobuf_util.go
index 3e46311a..1c8dbdce 100644
--- a/protobuf_util.go
+++ b/protobuf_util.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protobuf_util_test.go b/protobuf_util_test.go
index b83b9003..262a1c3c 100644
--- a/protobuf_util_test.go
+++ b/protobuf_util_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protocol.go b/protocol.go
index e85565ab..e28a6964 100644
--- a/protocol.go
+++ b/protocol.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protocol_connect.go b/protocol_connect.go
index 6f8b63cc..8c2f4f24 100644
--- a/protocol_connect.go
+++ b/protocol_connect.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protocol_connect_test.go b/protocol_connect_test.go
index ae1bedea..9b3571cf 100644
--- a/protocol_connect_test.go
+++ b/protocol_connect_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protocol_grpc.go b/protocol_grpc.go
index ce8ceb03..b14f2293 100644
--- a/protocol_grpc.go
+++ b/protocol_grpc.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protocol_grpc_test.go b/protocol_grpc_test.go
index 95886b09..5bef77fe 100644
--- a/protocol_grpc_test.go
+++ b/protocol_grpc_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/protocol_test.go b/protocol_test.go
index 2c925ae5..f35fa0ac 100644
--- a/protocol_test.go
+++ b/protocol_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/recover.go b/recover.go
index fc3ca6eb..72f535ea 100644
--- a/recover.go
+++ b/recover.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // 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/recover_ext_test.go b/recover_ext_test.go
index a385b1d1..a09f461c 100644
--- a/recover_ext_test.go
+++ b/recover_ext_test.go
@@ -1,4 +1,4 @@
-// Copyright 2021-2023 The Connect Authors
+// Copyright 2021-2024 The Connect Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.