diff --git a/cdr_schemas/cdr_responses/features.py b/cdr_schemas/cdr_responses/features.py
index 9d987eb..bdb8027 100644
--- a/cdr_schemas/cdr_responses/features.py
+++ b/cdr_schemas/cdr_responses/features.py
@@ -38,7 +38,7 @@ class PolygonExtractionResponse(BaseModel):
     system_version: str = Field(
         default="", description="System version that published this item"
     )
-    validated: bool = Field(default=False, description="Validated by human")
+    validated: Optional[bool] = Field(default=None, description="Validated by human")
     legend_id: str = Field(default="", description="Associated CDR legend id")
     projected_feature: List[ProjectedFeature] = Field(
         default_factory=list,
diff --git a/cdr_schemas/cdr_responses/legend_items.py b/cdr_schemas/cdr_responses/legend_items.py
index 33b634a..be94bd9 100644
--- a/cdr_schemas/cdr_responses/legend_items.py
+++ b/cdr_schemas/cdr_responses/legend_items.py
@@ -40,7 +40,7 @@ class LegendItemResponse(BaseModel):
     model_id: str = Field(
         default="", description="Model id for the model used to generate this item"
     )
-    validated: bool = Field(default=False, description="Validated by human")
+    validated: Optional[bool] = Field(default=None, description="Validated by human")
     confidence: Optional[float] = None
     map_unit_age_text: str = Field(default="", description="Age of map unit")
     map_unit_lithology: str = Field(default="", description="Map unit lithology")