diff --git a/cli/src/core/models.py b/cli/src/core/models.py
index 344b547..bd8704a 100644
--- a/cli/src/core/models.py
+++ b/cli/src/core/models.py
@@ -137,7 +137,7 @@ 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]]
+    tree: ET.ElementTree
 
     @classmethod
     def read_from_file(cls) -> "ServiceManagerUI":