diff --git a/README.md b/README.md
index 00b051b..17b8d08 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,6 @@
 shared_secret = your_shared_secret
 ```
 
-
 ## example usage
 
 ### command line
@@ -55,6 +54,37 @@
 certbot certonly -c wildcard-ini
 ```
 
+## help
+```
+usage: update-record.py [-h] -r type [--delete] [-u] [-c path] [-t TTL]
+                        [-s section] [-v] [-d]
+                        domain [content]
+
+inwx subdomain update
+
+positional arguments:
+  domain                full domain like subdomain.example.com
+  content               ip or string to fill/update into subdomain domain
+                        entry
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -r type, --record-type type
+                        record type (A, AAAA, TXT, CNAME, TLSA)
+  --delete              delete existing record with given content, or delete
+                        all records if no content is given
+  -u, --update          update all existing records if one exists, otherwise
+                        fails
+  -c path, --config_file path
+                        path to configuration file
+  -t TTL, --ttl TTL     TTL (time to live) of the nameserver record in seconds
+                        (default 3600)
+  -s section, --config_section section
+                        configuration section (live, ote) default: live
+  -v, --verbose         verbose
+  -d, --debug           debug
+```
+
 ## Licences
 
 Get some code snippets from the [inwx documentation](https://www.inwx.de/de/help/apidoc/f/ch01s05.html#idm144) and form the [pyhton 2.7 inwx repository](https://github.com/inwx/python2.7-client).