diff --git a/src/cli/__main__.py b/src/cli/__main__.py
index 054be4eb..21387d7b 100644
--- a/src/cli/__main__.py
+++ b/src/cli/__main__.py
@@ -582,7 +582,7 @@ def reg_parser(subparsers):
         aliases=['register', 'r'],
         formatter_class=argparse.RawDescriptionHelpFormatter,
         description=reg_parser.__doc__,
-        help='register Pyarmor or upgrade Pyarmor license'
+        help='register Pyarmor or upgrade old Pyarmor license'
     )
 
     cparser.add_argument(