diff --git a/README.md b/README.md
index b27d6ac41..ef4d24bea 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,10 @@ moonbitlang/core is the standard library of the [MoonBit language](https://www.m
 
 It is experimental and under active development. At this early stage, our primary focus is on enhancing the functionality of `moonbitlang/core`.
 
-The API is subject to change. In future, we plan to reorganize the API to ensure a consistent style.
+⚠️**The API is subject to change.** In future, we plan to reorganize the API to ensure a consistent style.
 
 ## Contributing
 
 We are actively developing moonbitlang/core and appreciate your help!
 
-To contribute, please read the contribution guidelines at [CONTRIBUTING.md](./CONTRIBUTING.md).
\ No newline at end of file
+To contribute, please read the contribution guidelines at [CONTRIBUTING.md](./CONTRIBUTING.md).