diff --git a/migrate/versioning/shell.py b/migrate/versioning/shell.py
index 5fb86b1..fae0ce4 100644
--- a/migrate/versioning/shell.py
+++ b/migrate/versioning/shell.py
@@ -108,7 +108,7 @@ def main(argv=None, **kwargs):
         parser.error("Invalid command %s" % command)
 
     parser.set_usage(inspect.getdoc(command_func))
-    f_args, f_varargs, f_kwargs, f_defaults = inspect.getargspec(command_func)
+    f_args, f_varargs, f_kwargs, f_defaults, _, _, _ = inspect.getfullargspec(command_func)
     for arg in f_args:
         parser.add_option(
             "--%s" % arg,