diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index bda2547..97bcdb7 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -4,16 +4,16 @@
 # https://central.sonatype.com/artifact/org.assertj/assertj-core/versions
 assertJ = "3.26.3"
 # https://github.com/google/google-java-format/releases/
-googleJavaFormat = "1.24.0"
+googleJavaFormat = "1.35.0"
 # only used in Kotlin sample
 # https://central.sonatype.com/artifact/org.jetbrains.kotlin/kotlin-stdlib-jdk8/versions
 kotlin = "2.0.21"
 # https://github.com/facebook/ktfmt/releases/
-ktfmt = "0.52"
+ktfmt = "0.62"
 # https://central.sonatype.com/artifact/org.junit.jupiter/junit-jupiter/versions
 junit = "5.11.3"
 junitPlatform = "1.+"
-pkl = "0.27.0"
+pkl = "0.31.1"
 # only used for testing; use same version as Spring Boot
 # https://central.sonatype.com/artifact/org.springframework.boot/spring-boot/dependencies
 spring = "6.2.11"
@@ -22,7 +22,7 @@ springBoot = "3.5.6"
 # https://central.sonatype.com/artifact/com.github.spotbugs/spotbugs-annotations/versions
 spotbugsAnnotations = "4.9.0"
 # https://github.com/diffplug/spotless/releases
-spotlessPlugin = "6.25.0"
+spotlessPlugin = "8.4.0"
 # https://github.com/gradle-nexus/publish-plugin/releases/
 nexusPublishPlugin = "2.0.0"