diff --git a/reactive/webflux/kotlin/hello-security/build.gradle.kts b/reactive/webflux/kotlin/hello-security/build.gradle.kts
index ce05304..58b7dbb 100644
--- a/reactive/webflux/kotlin/hello-security/build.gradle.kts
+++ b/reactive/webflux/kotlin/hello-security/build.gradle.kts
@@ -3,8 +3,8 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     id("org.springframework.boot") version "2.5.0"
     id("io.spring.dependency-management") version "1.0.9.RELEASE"
-    kotlin("jvm") version "1.5.31"
-    kotlin("plugin.spring") version "1.5.31"
+    kotlin("jvm") version "1.6.0"
+    kotlin("plugin.spring") version "1.6.0"
 }
 
 repositories {
@@ -34,7 +34,7 @@ dependencies {
 tasks.withType<KotlinCompile> {
     kotlinOptions {
         freeCompilerArgs = listOf("-Xjsr305=strict")
-        jvmTarget = "11"
+        jvmTarget = "17"
     }
 }
 
diff --git a/servlet/spring-boot/kotlin/hello-security/build.gradle.kts b/servlet/spring-boot/kotlin/hello-security/build.gradle.kts
index 33155d2..968fc25 100644
--- a/servlet/spring-boot/kotlin/hello-security/build.gradle.kts
+++ b/servlet/spring-boot/kotlin/hello-security/build.gradle.kts
@@ -3,8 +3,8 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     id("org.springframework.boot") version "2.5.0"
     id("io.spring.dependency-management") version "1.0.9.RELEASE"
-    kotlin("jvm") version "1.5.31"
-    kotlin("plugin.spring") version "1.5.31"
+    kotlin("jvm") version "1.6.0"
+    kotlin("plugin.spring") version "1.6.0"
 }
 
 repositories {
@@ -28,7 +28,7 @@ dependencies {
 tasks.withType<KotlinCompile> {
     kotlinOptions {
         freeCompilerArgs = listOf("-Xjsr305=strict")
-        jvmTarget = "11"
+        jvmTarget = "17"
     }
 }