diff --git a/mirth_client/models.py b/mirth_client/models.py
index 7e63eba..de1e992 100644
--- a/mirth_client/models.py
+++ b/mirth_client/models.py
@@ -3,7 +3,6 @@
 and converting returned data into Python objects
 """
 
-import xml
 from collections import OrderedDict
 from datetime import datetime
 from typing import (
@@ -24,6 +23,7 @@
 import typing
 import pydantic
 from packaging import version
+from xml.parsers.expat import ExpatError
 
 if typing.TYPE_CHECKING or version.parse(pydantic.__version__) >= version.parse("2.0"):
     from pydantic.v1 import (
@@ -226,7 +226,7 @@ def parse_raw(  # pylint: disable=arguments-differ
             ValueError,
             TypeError,
             UnicodeDecodeError,
-            xml.parsers.expat.ExpatError,  # pylint: disable=no-member
+            ExpatError,  # pylint: disable=no-member
         ) as e:
             raise ValidationError([ErrorWrapper(e, loc="__obj__")], cls) from e
         return super().parse_raw(  # type: ignore
diff --git a/pyproject.toml b/pyproject.toml
index 9d4ea5b..031d414 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ docs = ["Sphinx", "sphinx-rtd-theme"]
 bandit = "^1.7.0"
 importlib-metadata = "<9" # Workaround for https://github.com/PyCQA/bandit/issues/951
 isort = ">=5.7,<7.0" 
-lxml = "^5.2.2" 
+lxml = ">=5.2.2,<7.0.0"
 mypy = "^1.1"
 pytest = ">=7,<9" 
 pytest-cov = ">=4,<8"