diff --git a/examples/examplepb/a_bit_of_everything.pb.go b/examples/examplepb/a_bit_of_everything.pb.go
index 0d8f3208cc6..30afc97d2d6 100644
--- a/examples/examplepb/a_bit_of_everything.pb.go
+++ b/examples/examplepb/a_bit_of_everything.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: examples/examplepb/a_bit_of_everything.proto
-// DO NOT EDIT!
 
 package examplepb
 
diff --git a/examples/examplepb/echo_service.pb.go b/examples/examplepb/echo_service.pb.go
index 8edcf616813..447758379c1 100644
--- a/examples/examplepb/echo_service.pb.go
+++ b/examples/examplepb/echo_service.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: examples/examplepb/echo_service.proto
-// DO NOT EDIT!
 
 /*
 Package examplepb is a generated protocol buffer package.
diff --git a/examples/examplepb/flow_combination.pb.go b/examples/examplepb/flow_combination.pb.go
index 486b7c60682..421c9a87a20 100644
--- a/examples/examplepb/flow_combination.pb.go
+++ b/examples/examplepb/flow_combination.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: examples/examplepb/flow_combination.proto
-// DO NOT EDIT!
 
 package examplepb
 
diff --git a/examples/examplepb/stream.pb.go b/examples/examplepb/stream.pb.go
index 2411be64e9f..71066ccd964 100644
--- a/examples/examplepb/stream.pb.go
+++ b/examples/examplepb/stream.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: examples/examplepb/stream.proto
-// DO NOT EDIT!
 
 package examplepb
 
diff --git a/examples/sub/message.pb.go b/examples/sub/message.pb.go
index 57c4ecd8e6e..9faad923a57 100644
--- a/examples/sub/message.pb.go
+++ b/examples/sub/message.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: examples/sub/message.proto
-// DO NOT EDIT!
 
 /*
 Package sub is a generated protocol buffer package.
diff --git a/examples/sub2/message.pb.go b/examples/sub2/message.pb.go
index 18569d9427e..710d9525101 100644
--- a/examples/sub2/message.pb.go
+++ b/examples/sub2/message.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: examples/sub2/message.proto
-// DO NOT EDIT!
 
 /*
 Package sub2 is a generated protocol buffer package.
diff --git a/runtime/internal/stream_chunk.pb.go b/runtime/internal/stream_chunk.pb.go
index 9a140556495..44550f393b4 100644
--- a/runtime/internal/stream_chunk.pb.go
+++ b/runtime/internal/stream_chunk.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: runtime/internal/stream_chunk.proto
-// DO NOT EDIT!
 
 /*
 Package internal is a generated protocol buffer package.