diff --git a/src/rapids_dependency_file_generator/_rapids_dependency_file_generator.py b/src/rapids_dependency_file_generator/_rapids_dependency_file_generator.py
index 672131d..02f48fc 100644
--- a/src/rapids_dependency_file_generator/_rapids_dependency_file_generator.py
+++ b/src/rapids_dependency_file_generator/_rapids_dependency_file_generator.py
@@ -18,7 +18,7 @@
 HEADER = f"# This file is generated by `{cli_name}`."
 
 
-def delete_existing_files(root: os.PathLike) -> None:
+def delete_existing_files(root: str) -> None:
     """Delete any files generated by this generator.
 
     This function can be used to clean up a directory tree before generating a new set
@@ -26,7 +26,7 @@ def delete_existing_files(root: os.PathLike) -> None:
 
     Parameters
     ----------
-    root : PathLike
+    root : str
         The path (relative or absolute) to the root of the directory tree to search for files to delete.
     """
     for dirpath, _, filenames in os.walk(root):