diff --git a/monkey/monkey_island/cc/resources/agent_configuration.py b/monkey/monkey_island/cc/resources/agent_configuration.py
index 1bf311564..4715680a0 100644
--- a/monkey/monkey_island/cc/resources/agent_configuration.py
+++ b/monkey/monkey_island/cc/resources/agent_configuration.py
@@ -30,6 +30,6 @@ class AgentConfiguration(AbstractResource):
             return make_response({}, 200)
         except (InvalidConfigurationError, json.JSONDecodeError) as err:
             return make_response(
-                {"message": f"Invalid configuration supplied: {err}"},
+                {"error": f"Invalid configuration supplied: {err}"},
                 400,
             )