diff --git a/README.md b/README.md
index 6b0f515..fb68165 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,7 @@ ____
 > * tar
 > * [Python 3](https://www.python.org/downloads/) (tested version 3.9.5 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
 > * existing [/usr/local/bin/sendmail.py](https://git.hmp.today/pavel.muhortov/utils#sendmail-py)
+> * [curl](https://curl.se/download.html) (tested version 7.74.0 on [Debian GNU/Linux 11](http://ftp.debian.org/debian/dists/bullseye/))
 
 |  POSITION | PARAMETERS   |       DESCRIPTION      |    DEFAULT    |
 |-----------|--------------|------------------------|---------------|