The latest version of pebble has a dependency on an old version of SLF4j-API:

$ mvn dependency:tree
[INFO] +- io.pebbletemplates:pebble:jar:3.2.2:compile
[INFO] |  +- org.unbescape:unbescape:jar:1.1.6.RELEASE:compile
[INFO] |  \- org.slf4j:slf4j-api:jar:1.7.25:compile

This forces us to use an old version of SLF4j as implementation. Which in turn causes dependency checkers to complain about old versions in our pom.

Please update to the latest version.