diff --git a/adaptive_cards_python/adaptive_card/Extendable.py b/adaptive_cards_python/adaptive_card/Extendable.py
index ea9dab5..17af07e 100644
--- a/adaptive_cards_python/adaptive_card/Extendable.py
+++ b/adaptive_cards_python/adaptive_card/Extendable.py
@@ -10,7 +10,6 @@ class ConfiguredBaseModel(BaseModel):
         alias_generator=to_camel,
         populate_by_name=True,
         str_strip_whitespace=True,
-        str_to_lower=True,
     )