diff --git a/README.md b/README.md
index fbe9c40..de94a6a 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ Then, prepare your API:
         1. provide your API host in `API_HOST` constant.
         2. provide your API port in `PORT` constant.
 
-    > Warning!
+    > [!WARNING]
     > Do not change the structure of the `DATA` object. It must be an object with keys being IDs and values, which are objects with CSS selectors as keys and objects with DOM properties as values.
     > Make sure that your API is running on the same port as the one provided in `PORT` constant.