diff --git a/FAQ.md b/FAQ.md
index 3eb1eb9..8215ea3 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -648,7 +648,7 @@ https://raw.githubusercontent.com/rustdesk/rustdesk/master/res/audits.py
 
 Example: https://github.com/rustdesk/rustdesk/pull/12989
 
-- Address book: https://raw.githubusercontent.com/rustdesk/rustdesk/master/res/ab.py
+- Address book: https://raw.githubusercontent.com/rustdesk/rustdesk/master/res/ab.py (Pro version >= 1.6.5)
 
 Example: https://github.com/rustdesk/rustdesk/pull/12989