spring-boot-dependencies 2.4.0 imports both io.netty:netty-bom;4.1.54.Final and io.projectreactor:reactor-bom;2020.0.1. However, the reactor-bom imports libraries of io.projectreactor.netty:reactor-netty;1.0.1 which uses io.netty:netty-* series libraries of version 4.1.53.Final.

So should the version of netty-bom be 4.1.53.Final as well?

Comment From: philwebb

We'd rather pull in the latest version of Netty. They should be compatible so reactor-netty should run with the later version.