diff --git a/envoy/COMMIT b/envoy/COMMIT
index a4e0a6a523..6ba6e4624a 100644
--- a/envoy/COMMIT
+++ b/envoy/COMMIT
@@ -1 +1 @@
-575d44b9a7b0cd1db8feb84aa86cefa955df3f32
+5e4f35055a30f0990430664d74f6060a2a5ff20a
diff --git a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go
index 8eb209aca3..7519e8d9b8 100755
--- a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go
+++ b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go
@@ -46,16 +46,15 @@ const (
 // * Whether subsequent HTTP requests are transmitted synchronously or whether they are
 //   sent asynchronously.
 // * To modify request or response trailers if they already exist
-// * To add request or response trailers where they are not present
 //
 // The filter supports up to six different processing steps. Each is represented by
 // a gRPC stream message that is sent to the external processor. For each message, the
 // processor must send a matching response.
 //
 // * Request headers: Contains the headers from the original HTTP request.
-// * Request body: Sent in a single message if the BUFFERED or BUFFERED_PARTIAL
-//   mode is chosen, in multiple messages if the STREAMED mode is chosen, and not
-//   at all otherwise.
+// * Request body: Delivered if they are present and sent in a single message if
+//   the BUFFERED or BUFFERED_PARTIAL mode is chosen, in multiple messages if the
+//   STREAMED mode is chosen, and not at all otherwise.
 // * Request trailers: Delivered if they are present and if the trailer mode is set
 //   to SEND.
 // * Response headers: Contains the headers from the HTTP response. Keep in mind