diff --git a/README.md b/README.md
index ebb143e..cc2ece4 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ mail_settings.smtp_port | Any positive number | The port of the SMTP server
 mail_settings.smtp_tls | `Tls` or `Starttls` | The encryption method to use
 mail_settings.mail_from | String | The email address to be used
 mail_settings.mail_subject | String | The confirmation email's subject
+policy.key_max_validity | Any positive number | The maximum allowed validity period of a key in seconds. (optional)
 
 
 ## Environment Variables
diff --git a/example.config.toml b/example.config.toml
index 67a9724..e21792a 100644
--- a/example.config.toml
+++ b/example.config.toml
@@ -13,4 +13,7 @@ smtp_password = "verysecurepassword"
 smtp_port = 465
 smtp_tls = "Tls"
 mail_from = "key-submission@example.org"
-mail_subject = "Please confirm to %a your public key"
\ No newline at end of file
+mail_subject = "Please confirm to %a your public key"
+
+[policy]
+key_max_validity = 0