diff --git a/api/proto/v1/cdp-service.proto b/api/proto/v1/cdp-service.proto
index 76a5771..a2ae806 100644
--- a/api/proto/v1/cdp-service.proto
+++ b/api/proto/v1/cdp-service.proto
@@ -21,16 +21,18 @@ enum TransitionType {
 }
 
 message NavigateRequest {
-  string url = 1;
-  string referrer = 2;
-  TransitionType transitionType = 3;
-  string frameId = 4;
+  string api = 1;
+  string url = 2;
+  string referrer = 3;
+  TransitionType transitionType = 4;
+  string frameId = 5;
 }
 
 message NavigateReply {
-  string frameId = 1;
-  string loaderId = 2;
-  string errorText = 3;
+  string api = 1;
+  string frameId = 2;
+  string loaderId = 3;
+  string errorText = 4;
 }
 
 service CDPService {