diff --git a/pyomnilogic_local/models/util.py b/pyomnilogic_local/models/util.py
index 61feadc..6b786d5 100644
--- a/pyomnilogic_local/models/util.py
+++ b/pyomnilogic_local/models/util.py
@@ -2,7 +2,7 @@
 import logging
 from typing import Any, Literal, TypeVar, cast, overload
 
-from pydantic.utils import GetterDict
+from pydantic.v1.utils import GetterDict
 
 from .const import XML_NS
 from .filter_diagnostics import FilterDiagnostics