diff --git a/spring-security-modules/spring-security-web-x509/spring-security-web-x509-basic-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java b/spring-security-modules/spring-security-web-x509/spring-security-web-x509-basic-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java
index b99c242408..29beeef94c 100644
--- a/spring-security-modules/spring-security-web-x509/spring-security-web-x509-basic-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java
+++ b/spring-security-modules/spring-security-web-x509/spring-security-web-x509-basic-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java
@@ -3,11 +3,10 @@ package com.baeldung.spring.security.x509;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
-import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 
 @SpringBootApplication
 @EnableWebSecurity
-public class X509AuthenticationServer extends WebSecurityConfigurerAdapter {
+public class X509AuthenticationServer {
 
     public static void main(String[] args) {
         SpringApplication.run(X509AuthenticationServer.class, args);
diff --git a/spring-security-modules/spring-security-web-x509/spring-security-web-x509-client-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java b/spring-security-modules/spring-security-web-x509/spring-security-web-x509-client-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java
index 18bbfba835..7fc66a19bb 100644
--- a/spring-security-modules/spring-security-web-x509/spring-security-web-x509-client-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java
+++ b/spring-security-modules/spring-security-web-x509/spring-security-web-x509-client-auth/src/main/java/com/baeldung/spring/security/x509/X509AuthenticationServer.java
@@ -6,28 +6,31 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
-import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 import org.springframework.security.core.authority.AuthorityUtils;
 import org.springframework.security.core.userdetails.User;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.security.web.SecurityFilterChain;
 
 @SpringBootApplication
 @EnableWebSecurity
 @EnableGlobalMethodSecurity(prePostEnabled = true)
-public class X509AuthenticationServer extends WebSecurityConfigurerAdapter {
+public class X509AuthenticationServer {
     public static void main(String[] args) {
         SpringApplication.run(X509AuthenticationServer.class, args);
     }
 
-    @Override
-    protected void configure(HttpSecurity http) throws Exception {
-        http.authorizeRequests().anyRequest().authenticated()
-                .and()
-                .x509()
-                .subjectPrincipalRegex("CN=(.*?)(?:,|$)")
-                .userDetailsService(userDetailsService());
+    @Bean
+    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+        http.authorizeRequests()
+            .anyRequest()
+            .authenticated()
+            .and()
+            .x509()
+            .subjectPrincipalRegex("CN=(.*?)(?:,|$)")
+            .userDetailsService(userDetailsService());
+        return http.build();
     }
 
     @Bean