diff --git a/README.md b/README.md
index 0cbd0ef..fa89003 100644
--- a/README.md
+++ b/README.md
@@ -38,4 +38,6 @@ func main() {
 ## API
 
 - `Config.Skipper` skipper function to skip middleware
-- `Config.Fastest` if set true will use the `json-iterator` fastest config for better performance
\ No newline at end of file
+- `Config.Fastest` if set true will use the `json-iterator` fastest config for better performance
+- `Config.Marshal` custom marshal function
+- `Config.ContentType` the coontent type for response