1 files changed, 8 insertions, 2 deletions
diff --git a/openbb_platform/core/openbb_core/provider/standard_models/historical_attributes.py b/openbb_platform/core/openbb_core/provider/standard_models/historical_attributes.py
index 08fb79958ea..39c3e58b44c 100644
--- a/openbb_platform/core/openbb_core/provider/standard_models/historical_attributes.py
+++ b/openbb_platform/core/openbb_core/provider/standard_models/historical_attributes.py
@@ -47,10 +47,16 @@ class HistoricalAttributesQueryParams(QueryParams):
 
     @field_validator("symbol", mode="before", check_fields=False)
     @classmethod
-    def upper_symbol(cls, v: str) -> str:
-        """Convert symbol to uppercase."""
+    def to_upper(cls, v: str) -> str:
+        """Convert field to uppercase."""
         return v.upper()
 
+    @field_validator("frequency", "sort", mode="before", check_fields=False)
+    @classmethod
+    def to_lower(cls, v: Optional[str]) -> Optional[str]:
+        """Convert field to lowercase."""
+        return v.lower() if v else v
+
 
 class HistoricalAttributesData(Data):
     """Historical Attributes Data."""