diff --git a/brainles_preprocessing/cli.py b/brainles_preprocessing/cli.py
index 5490d51..2a8315b 100644
--- a/brainles_preprocessing/cli.py
+++ b/brainles_preprocessing/cli.py
@@ -59,7 +59,7 @@ def main(
         ),
     ],
     output_dir: Annotated[
-        str | Path,
+        str,
         typer.Option(
             "-o",
             "--output_dir",