diff --git a/build.gradle.kts b/build.gradle.kts
index 18f9e787..f2c9e473 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -13,7 +13,7 @@ val kotlinVersion = "1.9.0"
 val freemarkerVersion = "2.3.32"
 val kotestVersion = "5.6.2"
 val bouncyCastleVersion = "1.70"
-val springBootVersion = "2.7.13"
+val springBootVersion = "3.1.1"
 val reactorTestVersion = "3.4.24"
 val ktorVersion = "2.3.2"
 
diff --git a/src/test/java/examples/java/springboot/login/OAuth2LoginApp.java b/src/test/java/examples/java/springboot/login/OAuth2LoginApp.java
index ec7dbccb..e79a0312 100644
--- a/src/test/java/examples/java/springboot/login/OAuth2LoginApp.java
+++ b/src/test/java/examples/java/springboot/login/OAuth2LoginApp.java
@@ -18,6 +18,8 @@
 
 import java.io.IOException;
 
+import static org.springframework.security.config.Customizer.withDefaults;
+
 @SpringBootApplication
 public class OAuth2LoginApp {
     public static void main(String[] args) throws IOException {
@@ -41,13 +43,9 @@ static class SecurityConfiguration {
 
         @Bean
         public SecurityWebFilterChain securityWebFilterChain(ServerHttpSecurity http) {
-            return http
-                    .authorizeExchange()
-                    .anyExchange().authenticated()
-                    .and()
-                    .oauth2Login()
-                    .and()
-                    .build();
+            return http.authorizeExchange(exchanges -> exchanges.anyExchange().authenticated())
+                           .oauth2Login(withDefaults())
+                           .build();
         }
 
         @Bean
diff --git a/src/test/java/examples/java/springboot/resourceserver/OAuth2ResourceServerApp.java b/src/test/java/examples/java/springboot/resourceserver/OAuth2ResourceServerApp.java
index cc6adcd1..3d857b1f 100644
--- a/src/test/java/examples/java/springboot/resourceserver/OAuth2ResourceServerApp.java
+++ b/src/test/java/examples/java/springboot/resourceserver/OAuth2ResourceServerApp.java
@@ -4,6 +4,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.annotation.Bean;
+import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
 import org.springframework.security.config.web.server.ServerHttpSecurity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
@@ -39,12 +40,9 @@ class SecurityConfiguration {
 
         @Bean
         public SecurityWebFilterChain securityWebFilterChain(ServerHttpSecurity http) {
-            return http
-                    .authorizeExchange()
-                    .anyExchange().authenticated()
-                    .and()
-                    .oauth2ResourceServer(ServerHttpSecurity.OAuth2ResourceServerSpec::jwt)
-                    .build();
+            return http.authorizeExchange(exchanges -> exchanges.anyExchange().authenticated())
+                           .oauth2ResourceServer(oauth2 -> oauth2.jwt(Customizer.withDefaults()))
+                           .build();
         }
 
         @Bean