diff --git a/api/envoy/extensions/filters/http/ext_proc/v3/processing_mode.proto b/api/envoy/extensions/filters/http/ext_proc/v3/processing_mode.proto
index dbe45d687872e..e2ec8946283a0 100644
--- a/api/envoy/extensions/filters/http/ext_proc/v3/processing_mode.proto
+++ b/api/envoy/extensions/filters/http/ext_proc/v3/processing_mode.proto
@@ -122,7 +122,7 @@ message ProcessingMode {
     // :ref:`StreamedBodyResponse <envoy_v3_api_msg_service.ext_proc.v3.StreamedBodyResponse>`
     // field, but the number of messages sent by the ext_proc server
     // does not need to equal the number of messages sent by the data
-    // plane.  This allows the ext_proc server to change the number of
+    // plane. This allows the ext_proc server to change the number of
     // messages sent on the stream.
     // In this mode, the client will send body and trailers to the server as
     // they arrive.
diff --git a/api/envoy/service/ext_proc/v3/external_processor.proto b/api/envoy/service/ext_proc/v3/external_processor.proto
index b2853d38e0762..93265026ef852 100644
--- a/api/envoy/service/ext_proc/v3/external_processor.proto
+++ b/api/envoy/service/ext_proc/v3/external_processor.proto
@@ -227,10 +227,10 @@ message ProcessingResponse {
   // [#not-implemented-hide:]
   // Used only in ``FULL_DUPLEX_STREAMED`` and ``GRPC`` body send modes.
   // Instructs the data plane to stop sending body data and to send a
-  // half-close on the ext_proc stream.  The ext_proc server should then echo
+  // half-close on the ext_proc stream. The ext_proc server should then echo
   // back all subsequent body contents as-is until it sees the client's
   // half-close, at which point the ext_proc server can terminate the stream
-  // with an OK status.  This provides a safe way for the ext_proc server
+  // with an OK status. This provides a safe way for the ext_proc server
   // to indicate that it does not need to see the rest of the stream;
   // without this, the ext_proc server could not terminate the stream
   // early, because it would wind up dropping any body contents that the