diff --git a/readalongs/api.py b/readalongs/api.py
index 8ca72b6d..2d3f7d44 100644
--- a/readalongs/api.py
+++ b/readalongs/api.py
@@ -64,7 +64,7 @@ def align(
     output_base: Union[str, Path],
     language: Sequence[str] = (),
     output_formats: Sequence[str] = (),
-    **kwargs
+    **kwargs,
 ) -> Tuple[int, Optional[Exception], str]:
     """Run the "readalongs align" command from within a Python script.
 
@@ -122,7 +122,7 @@ def make_xml(
     plaintextfile: Union[str, Path],
     xmlfile: Union[str, Path],
     language: Sequence[str],
-    **kwargs
+    **kwargs,
 ) -> Tuple[int, Optional[Exception], str]:
     """Run the "readalongs make-xml" command from within a Python script.