diff --git a/FAQ.md b/FAQ.md
index b5c2164..cc3f080 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -458,7 +458,7 @@ Please confirm the [API address](https://github.com/rustdesk/rustdesk-server-pro
 
 You probably have one of below mistakes.
 - You changed api from `<ip>:21114` to `<domain_name>:80`, and blocked `21114`, but you still use `<domain_name>:21114` or forget to modify. So please double confirm, change api to `http://<domain_name>:80` (`:80` is not required, it is the default http port)
-- You changed from http to https, and blocked `80`, but you still use `http:<domain_name>` or use `https://<domain_name>:21114` or forget to modify, So please double confirm, change api to `https://<domain_name>:443` (`:443` is not required, it is the default https port)
+- You changed from http to https, and blocked `80`, but you still use `http:<domain_name>` or use `https://<domain_name>:21114` or forget to modify, So please double confirm, change api to `https://<domain_name>:443` (`:443` is not required, it is the default https port). Be careful here, it is `https` rather than `http`.
 
 # Unexpected character when log in