diff --git a/cli/src/core/models.py b/cli/src/core/models.py
index cad5637..344b547 100644
--- a/cli/src/core/models.py
+++ b/cli/src/core/models.py
@@ -3,7 +3,7 @@ import xml.etree.ElementTree as ET
 from typing import ClassVar
 
 import yaml
-from pydantic import BaseModel, field_validator
+from pydantic import BaseModel, ConfigDict, field_validator
 
 from core.enums import ServiceStatus
 from core.utils import get_git_root
@@ -134,6 +134,7 @@ class IocsOverview(BaseModel):
 
 # TODO: maybe separate models into their own files
 class ServiceManagerUI(BaseModel):
+    model_config = ConfigDict(arbitrary_types_allowed=True)
     config_path: ClassVar[str] = str(SERVICE_MANAGER_UI_FILENAME)
 
     tree: ET.ElementTree[ET.Element[str]]