diff --git a/README.md b/README.md
index 15796ec..0dd923b 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,11 @@
 certbot certonly -c wildcard-ini
 ```
 
+### use as basiy dynamic dns
+```
+./update-record.py -p -m update -c conf.cfg -t 300 -r AAAA device.example.com
+```
+
 ## help
 ```
 usage: update-record.py [-h] -r type [--delete] [-u] [-c path] [-t TTL]
diff --git a/update-record.py b/update-record.py
index eb83a2e..bffd72a 100755
--- a/update-record.py
+++ b/update-record.py
@@ -132,7 +132,7 @@
 	parser.add_argument('content', metavar='content', nargs='?', default=None, help='ip or string to fill/update into subdomain domain entry')
 	parser.add_argument('-r', '--record-type', metavar='type', required=True, choices=['A', 'AAAA', 'TXT', 'CNAME', 'TLSA'], help='record type (A, AAAA, TXT, CNAME, TLSA)')
 	parser.add_argument('-m', '--mode', metavar='mode', required=True, choices=['create', 'update', 'delete'], help='operation mode (create, update, delete)\nupdate:update all existing records if one exists, or create if not existing\ndelete: delete existing record with given content, or delete all records if no content is given')
-	parser.add_argument('-p', '--public-ip', action='store_true', required=False, help='insert public ip. Use A for ip4 an AAAA for ipv6')
+	parser.add_argument('-p', '--public-ip', action='store_true', required=False, help='insert public ip. Use -r A for ip4 an -r AAAA for ipv6')
 	parser.add_argument('-c', '--config_file', metavar='path', default='./conf.cfg', help='path to configuration file')
 	parser.add_argument('-t', '--ttl', default=3600, type=int, help='TTL (time to live) of the nameserver record in seconds (default 3600)')
 	parser.add_argument('-s', '--config_section', metavar='section', default='live', choices=['live', 'ote'], help='configuration section (live, ote) default: live')