diff --git a/wrapper/nlp b/wrapper/nlp
index 3d72579..6bb458d 100755
--- a/wrapper/nlp
+++ b/wrapper/nlp
@@ -15,12 +15,12 @@ parser = argparse.ArgumentParser(add_help=False)
 parser.add_argument(
     '-i',
     dest='input_dir',
-    required=True
+    required=False
 )
 parser.add_argument(
     '-o',
     dest='output_dir',
-    required=True
+    required=False
 )
 args, remaining_args = parser.parse_known_args()