diff --git a/reactive/webflux/kotlin/hello-security/build.gradle.kts b/reactive/webflux/kotlin/hello-security/build.gradle.kts
index fd00eac..599715f 100644
--- a/reactive/webflux/kotlin/hello-security/build.gradle.kts
+++ b/reactive/webflux/kotlin/hello-security/build.gradle.kts
@@ -1,16 +1,16 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-    id("org.springframework.boot") version "2.2.6.RELEASE"
+    id("org.springframework.boot") version "2.5.0"
     id("io.spring.dependency-management") version "1.0.9.RELEASE"
-    kotlin("jvm") version "1.3.71"
-    kotlin("plugin.spring") version "1.3.71"
+    kotlin("jvm") version "1.5.0"
+    kotlin("plugin.spring") version "1.5.0"
 }
 
 repositories {
     mavenCentral()
     maven {
-        url = uri("https://repo.spring.io/libs-snapshot")
+        url = uri("https://repo.spring.io/snapshot")
     }
 }
 
diff --git a/servlet/spring-boot/kotlin/hello-security/build.gradle.kts b/servlet/spring-boot/kotlin/hello-security/build.gradle.kts
index 8831919..4f650c4 100644
--- a/servlet/spring-boot/kotlin/hello-security/build.gradle.kts
+++ b/servlet/spring-boot/kotlin/hello-security/build.gradle.kts
@@ -1,16 +1,16 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-    id("org.springframework.boot") version "2.3.1.RELEASE"
+    id("org.springframework.boot") version "2.5.0"
     id("io.spring.dependency-management") version "1.0.9.RELEASE"
-    kotlin("jvm") version "1.3.71"
-    kotlin("plugin.spring") version "1.3.71"
+    kotlin("jvm") version "1.5.0"
+    kotlin("plugin.spring") version "1.5.0"
 }
 
 repositories {
     mavenCentral()
     maven {
-        url = uri("https://repo.spring.io/libs-snapshot")
+        url = uri("https://repo.spring.io/snapshot")
     }
 }
 
diff --git a/servlet/spring-boot/kotlin/hello-security/src/test/kotlin/org/springframework/security/samples/KotlinApplicationTests.kt b/servlet/spring-boot/kotlin/hello-security/src/test/kotlin/org/springframework/security/samples/KotlinApplicationTests.kt
index e3fea7d..811f834 100644
--- a/servlet/spring-boot/kotlin/hello-security/src/test/kotlin/org/springframework/security/samples/KotlinApplicationTests.kt
+++ b/servlet/spring-boot/kotlin/hello-security/src/test/kotlin/org/springframework/security/samples/KotlinApplicationTests.kt
@@ -17,8 +17,8 @@
 package org.springframework.security.samples
 
 import org.assertj.core.api.Assertions.assertThat
-import org.junit.Test
-import org.junit.runner.RunWith
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc
 import org.springframework.boot.test.context.SpringBootTest
@@ -26,12 +26,12 @@ import org.springframework.mock.web.MockHttpSession
 import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestBuilders.formLogin
 import org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.authenticated
 import org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.unauthenticated
-import org.springframework.test.context.junit4.SpringRunner
+import org.springframework.test.context.junit.jupiter.SpringExtension
 import org.springframework.test.web.servlet.MockMvc
-import org.springframework.test.web.servlet.get
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
 import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
 
-@RunWith(SpringRunner::class)
+@ExtendWith(SpringExtension::class)
 @SpringBootTest
 @AutoConfigureMockMvc
 class KotlinApplicationTests {
@@ -41,16 +41,14 @@ class KotlinApplicationTests {
 
     @Test
     fun `index page is not protected`() {
-        this.mockMvc.get("/")
-                .andExpect {
-                    status { isOk }
-                }
+        this.mockMvc.perform(get("/"))
+                .andExpect(status().isOk())
     }
 
     @Test
     fun `protected page redirects to login`() {
-        val mvcResult = this.mockMvc.get("/user/index")
-                .andExpect { status { is3xxRedirection } }
+        val mvcResult = this.mockMvc.perform(get("/user/index"))
+                .andExpect(status().is3xxRedirection())
                 .andReturn()
 
         assertThat(mvcResult.response.redirectedUrl).endsWith("/log-in")
@@ -76,10 +74,8 @@ class KotlinApplicationTests {
 
         val httpSession = mvcResult.request.getSession(false) as MockHttpSession
 
-        this.mockMvc.get("/user/index") {
-            session = httpSession
-        }.andExpect {
-            status { isOk }
-        }
+        this.mockMvc.perform(get("/user/index")
+                .session(httpSession))
+                .andExpect(status().isOk());
     }
 }