diff --git a/aruna/api/internal/v1/notification.proto b/aruna/api/internal/v1/notification.proto
index 79af1d44..dbb6713e 100644
--- a/aruna/api/internal/v1/notification.proto
+++ b/aruna/api/internal/v1/notification.proto
@@ -101,6 +101,8 @@ message CreateStreamGroupRequest {
     string resource_id = 4;
     // Should all "sub" resources be included
     bool notify_on_sub_resource = 5; 
+    // Subject derived from a resource hierarchy
+    string subject = 6;
 } 
 
 message CreateStreamGroupResponse {