diff --git a/waybackpy/cli.py b/waybackpy/cli.py
index 5c5da6c..04d7670 100644
--- a/waybackpy/cli.py
+++ b/waybackpy/cli.py
@@ -94,7 +94,9 @@ def parse_args(argv):
     parser.add_argument("-MIN", "--minute", type=int, help="Minute in integer. For use with --near.")
     return parser.parse_args(argv[1:])
 
-def main(argv):
+def main(argv=None):
+    if args is None:
+        args = sys.argv
     args = parse_args(argv)
     output = args_handler(args)
     print(output)