diff --git a/proto/audit/v1/event_entity.proto b/proto/audit/v1/event_entity.proto
index 0e2046f..060c8ca 100644
--- a/proto/audit/v1/event_entity.proto
+++ b/proto/audit/v1/event_entity.proto
@@ -22,6 +22,7 @@ enum AppProtocol {
   APP_PROTOCOL_DNS = 1;
   APP_PROTOCOL_HTTP = 2;
   APP_PROTOCOL_HTTP_PROXY = 3;
+  APP_PROTOCOL_PPROF = 4;
 }
 
 enum TLSVersion {