Update README.md

README.md

@@ -5,7 +5,7 @@ Jollyday is a java library to query public holidays. Currently, we support **ove
 ## How to use it
 
 **Jollyday** is based on **Java 11** and can be used directly as dependency via maven or gradle e.g.
-The calculation basis of the public holidays for each country is based on a xml file and will be mapped via Jakarta XML Binding.
+The calculation basis of the public holidays for each country is based on a xml file and will be mapped via Jakarta XML Binding or Jackson.
 If you already use one of these libraries in your project than just use the specific jollyday dependency.
 
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