diff --git a/README.md b/README.md
index 47d6cb6..2e3f346 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,7 @@ The action accepts the following parameters:
 | <nobr>`user_street`</nobr>             | String  | The street address of the contact                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                 |
 | <nobr>`user_postal_code`</nobr>        | String  | The postal code of the contact                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                 |
 | <nobr>`user_city`</nobr>               | String  | The city of the contact                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                 |
+| <nobr>`user_country`</nobr>            | String  | The country of the contact                                                          | [ISO 3166-1 Alpha-2 country codes](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements)                                                                                                                                                                                                                                                                                                        |                                                                 |
 | <nobr>`user_telephone`</nobr>          | String  | The telephone number of the contact                                                 |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                 |
 | <nobr>`user_company`</nobr>            | String  | The company of the contact                                                          |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                 |
 | <nobr>`user_extrafield`</nobr>         | String  | Additional information of the contact                                               |                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                 |