diff --git a/README.md b/README.md
index 880fbe1..99bce21 100644
--- a/README.md
+++ b/README.md
@@ -293,7 +293,7 @@ PROMPT KEYS:
 2. Create a sweeter shortcut with some convenience.
 
        alias b='buku --suggest'
-3. Auto-import bookmarks from your browser(s).
+3. Auto-import bookmarks from your browser(s). Please quit the relevant browsers beforehand to ensure the databases are not locked.
 
        b --ai
 4. Manually add a bookmark (for hands-on).