diff --git a/build-plugin/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/testkit/PluginClasspathGradleBuild.java b/build-plugin/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/testkit/PluginClasspathGradleBuild.java
index a9f617a7264..1e7785c3565 100644
--- a/build-plugin/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/testkit/PluginClasspathGradleBuild.java
+++ b/build-plugin/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/testkit/PluginClasspathGradleBuild.java
@@ -86,10 +86,9 @@ public class PluginClasspathGradleBuild extends GradleBuild {
 		if (this.kotlin) {
 			classpath.add(new File(pathOfJarContaining("org.jetbrains.kotlin.cli.common.PropertiesKt")));
 			classpath.add(new File(pathOfJarContaining(KotlinToolingVersion.class)));
-			classpath.add(new File(pathOfJarContaining("org.jetbrains.kotlin.build.report.metrics.BuildTime")));
+			classpath.add(new File(pathOfJarContaining("org.jetbrains.kotlin.build.report.metrics.BuildTimes")));
 			classpath.add(new File(pathOfJarContaining("org.jetbrains.kotlin.buildtools.api.CompilationService")));
 			classpath.add(new File(pathOfJarContaining("org.jetbrains.kotlin.daemon.client.KotlinCompilerClient")));
-			classpath.add(new File(pathOfJarContaining("org.jetbrains.kotlin.konan.library.KonanLibrary")));
 			classpath.add(new File(pathOfJarContaining(KotlinCompilerPluginSupportPlugin.class)));
 			classpath.add(new File(pathOfJarContaining(LanguageSettings.class)));
 			classpath.add(new File(pathOfJarContaining(BuildUidService.class)));
diff --git a/gradle.properties b/gradle.properties
index b9e7437f1f5..11e584a9b01 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -15,7 +15,7 @@ jackson2Version=2.21.1
 jacksonVersion=3.1.0
 javaFormatVersion=0.0.47
 junitJupiterVersion=6.0.3
-kotlinVersion=2.3.10
+kotlinVersion=2.3.20
 mavenVersion=3.9.13
 mockitoVersion=5.23.0
 nativeBuildToolsVersion=0.11.5