diff --git a/proto/load_generator.proto b/proto/load_generator.proto
index 4c5fa5648364fa809bb6dd41733c6a38c78ba93d..395afbb883d4c014432a056ada5ca5bb467738a3 100644
--- a/proto/load_generator.proto
+++ b/proto/load_generator.proto
@@ -54,10 +54,11 @@ message Parameters {
   repeated ScalarOrRange availability = 6;    // one from the list is selected
   repeated ScalarOrRange capacity_gbps = 7;   // one from the list is selected
   repeated ScalarOrRange e2e_latency_ms = 8;  // one from the list is selected
-  bool do_teardown = 9;
-  bool dry_mode = 10;
-  bool record_to_dlt = 11;
-  string dlt_domain_id = 12;
+  uint32 max_workers = 9;
+  bool do_teardown = 10;
+  bool dry_mode = 11;
+  bool record_to_dlt = 12;
+  string dlt_domain_id = 13;
 }
 
 message Status {