diff --git a/README.md b/README.md
index 4d5e23d..2fb5830 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ sops.templates."actualbudget-report-env".content = ''
     SMTP_USERNAME=
     SMTP_PASSWORD=
     SMTP_HOST=
+    SMTP_PORT=
     SMTP_RECIPIENTS=
     BUDGET_ENCRYPTION_KEY=
 '';