Add note that parsson is a hardcoded default in json-p api jar
diff --git a/src/site/markdown/index.md b/src/site/markdown/index.md
index d3c9018..105bb84 100644
--- a/src/site/markdown/index.md
+++ b/src/site/markdown/index.md
@@ -52,6 +52,9 @@
</dependency>
]]></pre>
+**Please note**: The jakarta JSON-P API jar has [hardcoded parsson](https://github.com/jakartaee/jsonp-api/blob/2.1.2/api/src/main/java/jakarta/json/spi/JsonProvider.java#L74-L79) as the default JSON-P implementation.
+This might cause unintended behaviour in cases where standard Java service loading is not possible.
+
#### Johnzon Factory Configurations
##### JsonGeneratorFactory
