diff --git a/Jenkinsfile b/Jenkinsfile
index 21133baa..d5757dba 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,7 +1,6 @@
 // Builds a module using https://github.com/jenkins-infra/pipeline-library
 buildPlugin(useContainerAgent: true, configurations: [
-    [platform: 'linux', jdk: 11], 
-    [platform: 'windows', jdk: 11],
+    [platform: 'windows', jdk: 17],
     [platform: 'linux', jdk: 17],
     [platform: 'linux', jdk: 21]
 ])
diff --git a/pom.xml b/pom.xml
index c45b92ec..0edbaffc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,17 +52,20 @@
     <gitHubRepo>jenkinsci/${project.artifactId}-plugin</gitHubRepo>
     <jira-rest-client.version>5.2.7</jira-rest-client.version>
     <fugue.version>4.7.2</fugue.version>
-    <!-- jenkins -->
-    <jenkins.version>2.440.3</jenkins.version>
+    <!-- TODO: Remove when 2.472 is available in LTS -->
+    <jenkins.version>2.472</jenkins.version>
+    <!-- TODO JENKINS-73339 until in parent POM -->
+    <jenkins-test-harness.version>2254.vcff7a_d4969e5</jenkins-test-harness.version>
     <spotless.check.skip>false</spotless.check.skip>
+    <maven.compiler.release>17</maven.compiler.release>
   </properties>
 
   <dependencyManagement>
     <dependencies>
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
-        <artifactId>bom-2.440.x</artifactId>
-        <version>3234.v5ca_5154341ef</version>
+        <artifactId>bom-2.462.x</artifactId>
+        <version>3258.vcdcf15936a_fd</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>
diff --git a/src/test/java/com/atlassian/httpclient/apache/httpcomponents/ApacheAsyncHttpClientTest.java b/src/test/java/com/atlassian/httpclient/apache/httpcomponents/ApacheAsyncHttpClientTest.java
index 5a33cbfa..405bda4f 100644
--- a/src/test/java/com/atlassian/httpclient/apache/httpcomponents/ApacheAsyncHttpClientTest.java
+++ b/src/test/java/com/atlassian/httpclient/apache/httpcomponents/ApacheAsyncHttpClientTest.java
@@ -10,25 +10,24 @@
 import hudson.ProxyConfiguration;
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Path;
 import java.util.Base64;
 import java.util.Date;
 import java.util.Optional;
 import java.util.concurrent.TimeUnit;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
 import jenkins.model.Jenkins;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.eclipse.jetty.http.HttpHeader;
 import org.eclipse.jetty.http.HttpStatus;
+import org.eclipse.jetty.io.Content;
 import org.eclipse.jetty.server.ConnectionFactory;
 import org.eclipse.jetty.server.Handler;
 import org.eclipse.jetty.server.HttpConnectionFactory;
 import org.eclipse.jetty.server.Server;
 import org.eclipse.jetty.server.ServerConnector;
-import org.eclipse.jetty.server.handler.AbstractHandler;
+import org.eclipse.jetty.util.Callback;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Rule;
@@ -151,7 +150,7 @@ public void simple_post_with_proxy() throws Exception {
         Assert.assertEquals("FOO", testHandler.postReceived);
     }
 
-    public class ProxyTestHandler extends AbstractHandler {
+    public static class ProxyTestHandler extends Handler.Abstract {
 
         String postReceived;
 
@@ -164,55 +163,50 @@ public class ProxyTestHandler extends AbstractHandler {
         final String realm = "test_realm";
 
         @Override
-        public void handle(
-                String target,
-                org.eclipse.jetty.server.Request jettyRequest,
-                HttpServletRequest request,
-                HttpServletResponse response)
-                throws IOException, ServletException {
+        public boolean handle(
+                org.eclipse.jetty.server.Request request, org.eclipse.jetty.server.Response response, Callback callback)
+                throws IOException {
 
             final String credentials = Base64.getEncoder().encodeToString((user + ":" + password).getBytes("UTF-8"));
 
-            jettyRequest.setHandled(true);
-
-            String authorization = request.getHeader(HttpHeader.PROXY_AUTHORIZATION.asString());
+            String authorization = request.getHeaders().get(HttpHeader.PROXY_AUTHORIZATION.asString());
             if (authorization == null) {
                 response.setStatus(HttpStatus.PROXY_AUTHENTICATION_REQUIRED_407);
-                response.setHeader(HttpHeader.PROXY_AUTHENTICATE.asString(), "Basic realm=\"" + realm + "\"");
-                return;
+                response.getHeaders().add(HttpHeader.PROXY_AUTHENTICATE.asString(), "Basic realm=\"" + realm + "\"");
+                callback.succeeded();
+                return true;
             } else {
                 String prefix = "Basic ";
                 if (authorization.startsWith(prefix)) {
                     String attempt = authorization.substring(prefix.length());
                     if (!credentials.equals(attempt)) {
-                        return;
+                        callback.succeeded();
+                        return true;
                     }
                 }
             }
 
             if (StringUtils.equalsIgnoreCase("post", request.getMethod())) {
-                postReceived = IOUtils.toString(request.getReader());
+                postReceived = Content.Source.asString(request, StandardCharsets.UTF_8);
             }
-            response.getWriter().write(CONTENT_RESPONSE);
+            Content.Sink.write(response, true, CONTENT_RESPONSE, callback);
+            return true;
         }
     }
 
-    public class TestHandler extends AbstractHandler {
+    public static class TestHandler extends Handler.Abstract {
 
         String postReceived;
 
         @Override
-        public void handle(
-                String target,
-                org.eclipse.jetty.server.Request jettyRequest,
-                HttpServletRequest request,
-                HttpServletResponse response)
-                throws IOException, ServletException {
-            jettyRequest.setHandled(true);
+        public boolean handle(
+                org.eclipse.jetty.server.Request request, org.eclipse.jetty.server.Response response, Callback callback)
+                throws IOException {
             if (StringUtils.equalsIgnoreCase("post", request.getMethod())) {
-                postReceived = IOUtils.toString(request.getReader());
+                postReceived = Content.Source.asString(request, StandardCharsets.UTF_8);
             }
-            response.getWriter().write(CONTENT_RESPONSE);
+            Content.Sink.write(response, true, CONTENT_RESPONSE, callback);
+            return true;
         }
     }
 
diff --git a/src/test/java/hudson/plugins/jira/JiraSiteSecurity1029Test.java b/src/test/java/hudson/plugins/jira/JiraSiteSecurity1029Test.java
index 06acae62..63d7d185 100644
--- a/src/test/java/hudson/plugins/jira/JiraSiteSecurity1029Test.java
+++ b/src/test/java/hudson/plugins/jira/JiraSiteSecurity1029Test.java
@@ -26,11 +26,11 @@
 import jenkins.model.Jenkins;
 import jenkins.security.ApiTokenProperty;
 import net.sf.json.JSONObject;
+import org.eclipse.jetty.ee8.servlet.DefaultServlet;
+import org.eclipse.jetty.ee8.servlet.ServletContextHandler;
+import org.eclipse.jetty.ee8.servlet.ServletHolder;
 import org.eclipse.jetty.server.Server;
 import org.eclipse.jetty.server.ServerConnector;
-import org.eclipse.jetty.servlet.DefaultServlet;
-import org.eclipse.jetty.servlet.ServletContextHandler;
-import org.eclipse.jetty.servlet.ServletHolder;
 import org.htmlunit.HttpMethod;
 import org.htmlunit.Page;
 import org.htmlunit.WebRequest;