diff --git a/bfabric/experimental/app_interface/input_preparation/_spec.py b/bfabric/experimental/app_interface/input_preparation/_spec.py
index 1c83afe4..f11c4821 100644
--- a/bfabric/experimental/app_interface/input_preparation/_spec.py
+++ b/bfabric/experimental/app_interface/input_preparation/_spec.py
@@ -26,8 +26,8 @@ class DatasetSpec(BaseModel):
     id: int
     filename: RelativeFilePath
     separator: Literal[",", "\t"] = ","
-    has_header: bool
-    invalid_characters: str = ""
+    # has_header: bool
+    # invalid_characters: str = ""
 
 
 SpecType = Union[ResourceSpec, DatasetSpec]