diff --git a/main.py b/main.py
index acf2c59..12345d3 100644
--- a/main.py
+++ b/main.py
@@ -107,7 +107,7 @@ async def fastapi_execute_batch_commands(network: str, req: Request)-> ChangeSet
     for jo in jo_operations:
         print(jo)
         print(type(jo))
-        cs.add(jo)
+        cs.append(jo)
     return execute_batch_commands(network, cs)
     
 # node