diff --git a/README.md b/README.md
index 6795609..72ea216 100644
--- a/README.md
+++ b/README.md
@@ -35,5 +35,5 @@ let dt = FixedOffset::east_opt(34200)
 println!("{}", dt.formatl("%c", "fr"));
 ```
 
-All of [chrono's formatting placeholders](https://docs.rs/chrono/latest/chrono/format/strftime/index.html)
-work except for `%3f`, `%6f` and `%9f` (but `%.3f`, `%.6f` and `%.9f` work normally).
+> **Warning**
+> All of [chrono's formatting placeholders](https://docs.rs/chrono/latest/chrono/format/strftime/index.html) work except for `%3f`, `%6f` and `%9f` (but `%.3f`, `%.6f` and `%.9f` work normally).