diff --git a/kotlin/gradle/libs.versions.toml b/kotlin/gradle/libs.versions.toml
index ba8614cf..1a4b2801 100644
--- a/kotlin/gradle/libs.versions.toml
+++ b/kotlin/gradle/libs.versions.toml
@@ -29,7 +29,7 @@ greenmail = "2.1.8"
 hypersistence = "3.14.1"
 # jackson: avoid "2.16.1" with spring 3.2.2 (issues with .sonMappingException at JacksonModule.scala:61)
 # Check spring boot dependency table for supported version, e.g. https://docs.spring.io/spring-boot/appendix/dependency-versions/coordinates.html
-jackson =  "2.20.1"
+jackson =  "2.21.0"
 jackson3 =  "3.0.4"
 jacoco = "0.8.13"  # used like "toolVersion = libs.versions.jacoco.get()" in build.gradle.kts jacoco block
 kotlin = "2.3.0"