diff --git a/README.md b/README.md
index c711761..cdfe3b8 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ The generated HTML file is static, Javascript is not required.
 * More PDF stuffs that you love
   - Links
   - Outline
-  - Printing
+  - Printing (experimental)
 
 [Full list](https://github.com/coolwanglu/pdf2htmlEX/wiki/Feature-List)   
 [Compare with others](https://github.com/coolwanglu/pdf2htmlEX/wiki/Comparison)