diff --git a/clinicadl/splitter/config.py b/clinicadl/splitter/config.py
index 8bf639f09..a004dd510 100644
--- a/clinicadl/splitter/config.py
+++ b/clinicadl/splitter/config.py
@@ -23,7 +23,7 @@ class SplitConfig(BaseModel):
 
     n_splits: NonNegativeInt = 0
     split: Optional[Tuple[NonNegativeInt, ...]] = None
-    tsv_path: Optional[Path] = None  # not needed in predict ?
+    tsv_path: Path  # not needed in predict ?
 
     # pydantic config
     model_config = ConfigDict(validate_assignment=True)