diff --git a/pom.xml b/pom.xml
index f56ce82fb3..ed1a43d440 100644
--- a/pom.xml
+++ b/pom.xml
@@ -62,8 +62,8 @@
         <scope>import</scope>
       </dependency>
       <dependency>
-        <groupId>org.eclipse.jetty.ee8</groupId>
-        <artifactId>jetty-ee8-bom</artifactId>
+        <groupId>org.eclipse.jetty.ee9</groupId>
+        <artifactId>jetty-ee9-bom</artifactId>
         <version>${jetty.version}</version>
         <type>pom</type>
         <scope>import</scope>
@@ -170,13 +170,24 @@
       <artifactId>plexus-utils</artifactId>
       <version>3.5.1</version>
     </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-maven</artifactId>
+      <version>${jetty.version}</version>
+      <exclusions>
+        <exclusion>
+          <groupId>org.codehaus.plexus</groupId>
+          <artifactId>plexus-utils</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
     <dependency>
       <groupId>org.eclipse.jetty</groupId>
       <artifactId>jetty-server</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.eclipse.jetty.ee8</groupId>
-      <artifactId>jetty-ee8-maven-plugin</artifactId>
+      <groupId>org.eclipse.jetty.ee9</groupId>
+      <artifactId>jetty-ee9-maven-plugin</artifactId>
       <version>${jetty.version}</version>
       <exclusions>
         <exclusion>
@@ -186,17 +197,17 @@
       </exclusions>
     </dependency>
     <dependency>
-      <groupId>org.eclipse.jetty.ee8</groupId>
-      <artifactId>jetty-ee8-servlet</artifactId>
+      <groupId>org.eclipse.jetty.ee9</groupId>
+      <artifactId>jetty-ee9-servlet</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.eclipse.jetty.ee8</groupId>
-      <artifactId>jetty-ee8-webapp</artifactId>
+      <groupId>org.eclipse.jetty.ee9</groupId>
+      <artifactId>jetty-ee9-webapp</artifactId>
     </dependency>
     <dependency>
-      <groupId>org.eclipse.jetty.ee8.websocket</groupId>
-      <artifactId>jetty-ee8-websocket-jetty-server</artifactId>
-      <!-- or jetty-ee8-websocket-javax-server -->
+      <groupId>org.eclipse.jetty.ee9.websocket</groupId>
+      <artifactId>jetty-ee9-websocket-jetty-server</artifactId>
+      <!-- or jetty-ee9-websocket-jakarta-server -->
     </dependency>
     <dependency>
       <groupId>org.jenkins-ci</groupId>
@@ -319,7 +330,7 @@
         <configuration>
           <goalPrefix>hpi</goalPrefix>
           <extractors>java-annotations</extractors>
-          <mojoDependencies>org.eclipse.jetty.ee8:jetty-ee8-maven-plugin</mojoDependencies>
+          <mojoDependencies>org.eclipse.jetty.ee9:jetty-ee9-maven-plugin</mojoDependencies>
         </configuration>
         <executions>
           <execution>
diff --git a/src/it/parent-4x/pom.xml b/src/it/parent-4x/pom.xml
index eb1f5361fa..e413144a33 100644
--- a/src/it/parent-4x/pom.xml
+++ b/src/it/parent-4x/pom.xml
@@ -12,11 +12,23 @@
   <version>1.0-SNAPSHOT</version>
   <packaging>hpi</packaging>
   <properties>
-    <jenkins.version>2.361.4</jenkins.version>
+    <jenkins.version>2.475</jenkins.version>
+    <!-- TODO JENKINS-73339 until in parent POM -->
+    <jenkins-test-harness.version>2254.vcff7a_d4969e5</jenkins-test-harness.version>
     <hpi-plugin.version>@project.version@</hpi-plugin.version>
     <no-test-jar>false</no-test-jar>
     <spotless.check.skip>false</spotless.check.skip>
   </properties>
+  <dependencyManagement>
+    <dependencies>
+      <!-- TODO JENKINS-73339 until in parent POM, work around https://github.com/jenkinsci/plugin-pom/issues/936 -->
+      <dependency>
+        <groupId>jakarta.servlet</groupId>
+        <artifactId>jakarta.servlet-api</artifactId>
+        <version>5.0.0</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
   <dependencies>
     <dependency>
       <groupId>org.jenkins-ci.plugins</groupId>
diff --git a/src/it/parent-4x/src/main/java/test/JustTesting.java b/src/it/parent-4x/src/main/java/test/JustTesting.java
index 653bedd60a..a433b7d60c 100644
--- a/src/it/parent-4x/src/main/java/test/JustTesting.java
+++ b/src/it/parent-4x/src/main/java/test/JustTesting.java
@@ -5,6 +5,7 @@
 import java.util.concurrent.TimeUnit;
 import jenkins.model.Jenkins;
 import jenkins.util.Timer;
+import org.kohsuke.stapler.StaplerRequest2;
 
 public class JustTesting {
 
@@ -18,7 +19,7 @@ public static void shutDown() {
         Timer.get()
                 .schedule(
                         () -> {
-                            Jenkins.getInstance().doSafeExit(null);
+                            Jenkins.getInstance().doSafeExit((StaplerRequest2) null);
                             return null;
                         },
                         15,
diff --git a/src/it/parent-4x/verify.groovy b/src/it/parent-4x/verify.groovy
index f045d0b2c7..7201b83d06 100644
--- a/src/it/parent-4x/verify.groovy
+++ b/src/it/parent-4x/verify.groovy
@@ -25,7 +25,7 @@ checkArtifact(installed, 'parent-4x-1.0-SNAPSHOT.hpi',
     ['WEB-INF/lib/parent-4x.jar'],
     // TODO still some problems with unwanted transitive JAR dependencies creeping in, e.g. WEB-INF/lib/jboss-marshalling-1.4.9.Final.jar in workflow-multibranch.hpi, or all kinds of junk in parameterized-trigger.hpi
     ['test/SampleRootAction.class', 'WEB-INF/lib/symbol-annotation-1.5.jar'],
-    ['Short-Name': 'parent-4x', 'Group-Id': 'org.jenkins-ci.tools.hpi.its', 'Jenkins-Version': '2.361.4' /* Plugin-Version unpredictable for a snapshot */, 'Plugin-Dependencies': 'structs:324.va_f5d6774f3a_d'])
+    ['Short-Name': 'parent-4x', 'Group-Id': 'org.jenkins-ci.tools.hpi.its', 'Jenkins-Version': '2.475' /* Plugin-Version unpredictable for a snapshot */, 'Plugin-Dependencies': 'structs:324.va_f5d6774f3a_d'])
 
 checkArtifact(installed, 'parent-4x-1.0-SNAPSHOT.jar',
     ['META-INF/annotations/hudson.Extension', 'test/SampleRootAction.class', 'index.jelly'],
diff --git a/src/main/java/org/jenkinsci/maven/plugins/hpi/RunMojo.java b/src/main/java/org/jenkinsci/maven/plugins/hpi/RunMojo.java
index dc7bd10819..c644e3596b 100644
--- a/src/main/java/org/jenkinsci/maven/plugins/hpi/RunMojo.java
+++ b/src/main/java/org/jenkinsci/maven/plugins/hpi/RunMojo.java
@@ -80,11 +80,11 @@
 import org.eclipse.aether.RepositorySystem;
 import org.eclipse.aether.graph.DependencyFilter;
 import org.eclipse.aether.util.filter.ScopeDependencyFilter;
-import org.eclipse.jetty.ee8.maven.plugin.JettyRunWarMojo;
-import org.eclipse.jetty.ee8.maven.plugin.MavenWebAppContext;
-import org.eclipse.jetty.ee8.webapp.WebAppClassLoader;
-import org.eclipse.jetty.ee8.webapp.WebAppContext;
-import org.eclipse.jetty.ee8.websocket.server.config.JettyWebSocketServletContainerInitializer;
+import org.eclipse.jetty.ee9.maven.plugin.JettyRunWarMojo;
+import org.eclipse.jetty.ee9.maven.plugin.MavenWebAppContext;
+import org.eclipse.jetty.ee9.webapp.WebAppClassLoader;
+import org.eclipse.jetty.ee9.webapp.WebAppContext;
+import org.eclipse.jetty.ee9.websocket.server.config.JettyWebSocketServletContainerInitializer;
 import org.eclipse.jetty.http.HttpCompliance;
 import org.eclipse.jetty.http.UriCompliance;
 import org.eclipse.jetty.maven.MavenServerConnector;