diff --git a/envs/monkey_zoo/blackbox/island_client/monkey_island_client.py b/envs/monkey_zoo/blackbox/island_client/monkey_island_client.py
index 71f9f200c..b687890b0 100644
--- a/envs/monkey_zoo/blackbox/island_client/monkey_island_client.py
+++ b/envs/monkey_zoo/blackbox/island_client/monkey_island_client.py
@@ -5,6 +5,7 @@ from typing import Union
 
 from bson import json_util
 
+from common.configuration import AgentConfiguration
 from envs.monkey_zoo.blackbox.island_client.monkey_island_requests import MonkeyIslandRequests
 from envs.monkey_zoo.blackbox.test_configurations.test_configuration import TestConfiguration
 
@@ -33,7 +34,8 @@ class MonkeyIslandClient(object):
     @avoid_race_condition
     def import_config(self, test_configuration: TestConfiguration):
         self.requests.post(
-            "api/agent-configuration", data=test_configuration.agent_configuration.to_json()
+            "api/agent-configuration",
+            data=AgentConfiguration.to_mapping(test_configuration.agent_configuration),
         )
         serialized_propagation_credentials = json.dumps(
             [credential.to_json() for credential in test_configuration.propagation_credentials]