diff --git a/monkey/monkey_island/cc/resources/pba_file_upload.py b/monkey/monkey_island/cc/resources/pba_file_upload.py
index c62272e7c..d76b8665a 100644
--- a/monkey/monkey_island/cc/resources/pba_file_upload.py
+++ b/monkey/monkey_island/cc/resources/pba_file_upload.py
@@ -1,5 +1,4 @@
 import logging
-from dataclasses import replace
 from http import HTTPStatus
 
 from flask import Response, make_response, request, send_file
@@ -102,11 +101,15 @@ class PBAFileUpload(AbstractResource):
         agent_configuration = self._agent_configuration_repository.get_configuration()
 
         if target_os == LINUX_PBA_TYPE:
-            custom_pbas = replace(agent_configuration.custom_pbas, linux_filename=safe_filename)
+            custom_pbas = agent_configuration.custom_pbas.copy(
+                update={"linux_filename": safe_filename}
+            )
         else:
-            custom_pbas = replace(agent_configuration.custom_pbas, windows_filename=safe_filename)
+            custom_pbas = agent_configuration.custom_pbas.copy(
+                update={"windows_filename": safe_filename}
+            )
 
-        updated_agent_configuration = replace(agent_configuration, custom_pbas=custom_pbas)
+        updated_agent_configuration = agent_configuration.copy(update={"custom_pbas": custom_pbas})
         self._agent_configuration_repository.store_configuration(updated_agent_configuration)
 
     @jwt_required