diff --git a/apis/tinkoff/cloud/stt/v1/stt.proto b/apis/tinkoff/cloud/stt/v1/stt.proto
index 676b4f3..2489216 100644
--- a/apis/tinkoff/cloud/stt/v1/stt.proto
+++ b/apis/tinkoff/cloud/stt/v1/stt.proto
@@ -78,6 +78,8 @@ message RecognitionConfig {
     bool do_not_perform_vad = 13;
     VoiceActivityDetectionConfig vad_config = 14;
   }
+  reserved 15;
+  bool enable_denormalization = 16;
 }
 
 message RecognizeRequest {