diff --git a/README.md b/README.md
index d3f097e..93d31bb 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ The generated HTML file is static, Javascript is not required.
   - Normal HTML
   - All-in-one HTML - portable & easy to share
   - One HTML per page - best for dynamic pages
+  - Fallback - better accuracy and compatibility
 * More PDF stuffs that you love
   - Links
   - Outline