diff --git a/README.md b/README.md
index b09fcb2..f823fea 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,9 @@
 [![Coverage Status](https://coveralls.io/repos/github/baoyachi/serde_trim/badge.svg)](https://coveralls.io/github/baoyachi/serde_trim)
 
 ## Support trim
-* String
-* Vec<String>
-* Option<String>
+* `String`
+* `Vec<String>`
+* `Option<String>`
 
 
 ## how to use
@@ -56,4 +56,4 @@ fn main() {
     let foo = serde_json::from_str::<VecFoo>(json).unwrap();
     assert_eq!(foo.name, vec!["", "foo", "b ar", "hello", "rust"]);
 }
-```
\ No newline at end of file
+```