diff --git a/detector.py b/detector.py
index ff3184e..8e71208 100644
--- a/detector.py
+++ b/detector.py
@@ -17,7 +17,7 @@ def cli():
 
 
 @cli.command()
-@click.argument('path', type=click.path())
+@click.argument('path', type=click.Path())
 def build(path):
     """
     Builds the blast database.