diff --git a/README.md b/README.md
index 7d0ee57..046ca0e 100644
--- a/README.md
+++ b/README.md
@@ -5,8 +5,10 @@ This is a small hack to send faxes via the sipgate REST API from the command lin
 Add your login credentials to `login_credentials_muster.sh` and rename the file to `login_credentials.sh`
 
 ## Usage
-`fax.sh <letter.pdf> <recipient>`
+`./fax.sh <letter.pdf> <recipient>`
+
 sipgate doesn't accept pdf files larger than 30 pages or 10MB.
+
 ~~For now, `<recipient>` has to be numbers-only, starting with `+49`. It is planned to parse different number formats.~~ Should be done.
 
 `balance.sh` just gives your account balance.