jackson-module-kotlin 2.15.0-rc1 has been released. https://mvnrepository.com/artifact/com.fasterxml.jackson.module/jackson-module-kotlin/2.15.0-rc1 The following important changes have been made in this version • Reduction of the amount of memory consumed by the reflection cache • Fixed an issue caused by the name of is-getter (behavior change) • Removal of Kotlin 1.4 support • Scheduled deprecation of MissingKotlinParameterException For complete release notes, please see https://github.com/FasterXML/jackson-module-kotlin/blob/f66f8c4b32a64ea9e2bef45caca2ff876f8b2f6b/release-notes/VERSION-2.x#L19 Feedback and bug reports are welcome.