Important: This news article covers an old version of Javalin (v1.6.1). The current version is v6.1.3.
See the documentation page for up-to-date information.


  • You can now redirect inside exception mappers
  • Jackson now automatically register the Kotlin module if you’re using it
  • The LogUtil broke in 1.6.0 and stopped being able to measure time, this has been fixed


  • Kotlin has been bumped to 1.2.41