diff --git a/README.md b/README.md
index b88aa7e..021af2f 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,8 @@ func main() {
 }
 ```
 
+It's worth noting that only timeout related error responses are discarded. 5xx class responses or other errors will be cached as the response.
+
 ## Contributing
 
 1. Fork it
@@ -104,4 +106,4 @@ func main() {
 
 ## License ##
 
-See `LICENSE` for details
\ No newline at end of file
+See `LICENSE` for details