diff --git a/setup.cfg b/setup.cfg
index fbd9ad553..da19578ed 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -29,6 +29,7 @@ install_requires =
     openpyxl
     pandas
     portalocker
+    pydantic < 2
     python-dateutil
     pytz
     semantic-version