diff --git a/README.md b/README.md
index 8649e10..5bfc025 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@
 > cargo install pylyzer
 > ```
 
-**NOTE**: Installation by `cargo install pylyzer` is currently unavailable due to using a version of [the parser](https://github.com/RustPython/Parser/) not published on crates.io. Please clone the repository and build it directly.
+> **Warning**: Installation by `cargo install pylyzer` is currently unavailable due to using a version of [the parser](https://github.com/RustPython/Parser/) not published on crates.io. Please clone the repository and build it directly.
 
 ```bash
 git clone https://github.com/mtshiba/pylyzer.git