diff --git a/README.md b/README.md
index fe83999d..d802097f 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # What is Winstone?
 Winstone is a command line interface around Jetty 12.0.x, which implements
-Servlet 4.0 (JakartaEE 8/`javax.servlet.*`), WebSocket/JSR-356, and HTTP/2 support. It is used as the default
+Servlet 5.0 (JakartaEE 9/`jakarta.servlet.*`), WebSocket/JSR-356, and HTTP/2 support. It is used as the default
 embedded servlet container in Jenkins (via the `executable` package in the `war` module)
 and can be used by any other web applications that wants to be self-contained.
 
diff --git a/pom.xml b/pom.xml
index 8e1a1355..dddd5af0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -53,8 +53,8 @@
         <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>
@@ -115,17 +115,17 @@
       <artifactId>jetty-util</artifactId>
     </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-javax-server -->
     </dependency>
     <dependency>
       <groupId>org.eclipse.jetty.http2</groupId>
diff --git a/src/main/java/winstone/HostConfiguration.java b/src/main/java/winstone/HostConfiguration.java
index fca6314c..e9cb6cc1 100644
--- a/src/main/java/winstone/HostConfiguration.java
+++ b/src/main/java/winstone/HostConfiguration.java
@@ -8,6 +8,7 @@
 
 import edu.umd.cs.findbugs.annotations.NonNull;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import jakarta.servlet.SessionTrackingMode;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -29,9 +30,8 @@
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.util.logging.Level;
-import javax.servlet.SessionTrackingMode;
-import org.eclipse.jetty.ee8.webapp.WebAppContext;
-import org.eclipse.jetty.ee8.websocket.server.config.JettyWebSocketServletContainerInitializer;
+import org.eclipse.jetty.ee9.webapp.WebAppContext;
+import org.eclipse.jetty.ee9.websocket.server.config.JettyWebSocketServletContainerInitializer;
 import org.eclipse.jetty.security.LoginService;
 import org.eclipse.jetty.server.RequestLog;
 import org.eclipse.jetty.server.Server;
diff --git a/src/test/java/winstone/testApplication/filters/TimingFilter.java b/src/test/java/winstone/testApplication/filters/TimingFilter.java
index 28aaba5b..ed68def5 100644
--- a/src/test/java/winstone/testApplication/filters/TimingFilter.java
+++ b/src/test/java/winstone/testApplication/filters/TimingFilter.java
@@ -6,15 +6,15 @@
  */
 package winstone.testApplication.filters;
 
+import jakarta.servlet.Filter;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.FilterConfig;
+import jakarta.servlet.ServletContext;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletRequest;
+import jakarta.servlet.ServletResponse;
 import java.io.IOException;
 import java.util.Enumeration;
-import javax.servlet.Filter;
-import javax.servlet.FilterChain;
-import javax.servlet.FilterConfig;
-import javax.servlet.ServletContext;
-import javax.servlet.ServletException;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletResponse;
 
 /**
  * Simple timing and request dumping test filter
diff --git a/src/test/java/winstone/testApplication/filters/WriteAfterServletFilter.java b/src/test/java/winstone/testApplication/filters/WriteAfterServletFilter.java
index 61decab9..3905c8a9 100644
--- a/src/test/java/winstone/testApplication/filters/WriteAfterServletFilter.java
+++ b/src/test/java/winstone/testApplication/filters/WriteAfterServletFilter.java
@@ -1,13 +1,13 @@
 package winstone.testApplication.filters;
 
+import jakarta.servlet.Filter;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.FilterConfig;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletOutputStream;
+import jakarta.servlet.ServletRequest;
+import jakarta.servlet.ServletResponse;
 import java.io.IOException;
-import javax.servlet.Filter;
-import javax.servlet.FilterChain;
-import javax.servlet.FilterConfig;
-import javax.servlet.ServletException;
-import javax.servlet.ServletOutputStream;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletResponse;
 
 public class WriteAfterServletFilter implements Filter {
 
diff --git a/src/test/java/winstone/testApplication/listeners/SessionListener.java b/src/test/java/winstone/testApplication/listeners/SessionListener.java
index ad6cbe2b..12ec6812 100644
--- a/src/test/java/winstone/testApplication/listeners/SessionListener.java
+++ b/src/test/java/winstone/testApplication/listeners/SessionListener.java
@@ -6,11 +6,11 @@
  */
 package winstone.testApplication.listeners;
 
-import javax.servlet.http.HttpSessionActivationListener;
-import javax.servlet.http.HttpSessionAttributeListener;
-import javax.servlet.http.HttpSessionBindingEvent;
-import javax.servlet.http.HttpSessionEvent;
-import javax.servlet.http.HttpSessionListener;
+import jakarta.servlet.http.HttpSessionActivationListener;
+import jakarta.servlet.http.HttpSessionAttributeListener;
+import jakarta.servlet.http.HttpSessionBindingEvent;
+import jakarta.servlet.http.HttpSessionEvent;
+import jakarta.servlet.http.HttpSessionListener;
 
 /**
  * Logs messages when any session event is received
diff --git a/src/test/java/winstone/testApplication/servlets/AcceptFormServlet.java b/src/test/java/winstone/testApplication/servlets/AcceptFormServlet.java
index 32ee7bbb..2a9f2735 100644
--- a/src/test/java/winstone/testApplication/servlets/AcceptFormServlet.java
+++ b/src/test/java/winstone/testApplication/servlets/AcceptFormServlet.java
@@ -1,11 +1,11 @@
 package winstone.testApplication.servlets;
 
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.PrintWriter;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
 
 public class AcceptFormServlet extends HttpServlet {
 
diff --git a/src/test/java/winstone/testApplication/servlets/CountRequestsServlet.java b/src/test/java/winstone/testApplication/servlets/CountRequestsServlet.java
index 59e99d76..4745eb70 100644
--- a/src/test/java/winstone/testApplication/servlets/CountRequestsServlet.java
+++ b/src/test/java/winstone/testApplication/servlets/CountRequestsServlet.java
@@ -6,12 +6,12 @@
  */
 package winstone.testApplication.servlets;
 
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletOutputStream;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import javax.servlet.ServletException;
-import javax.servlet.ServletOutputStream;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
 
 /**
  * Simple test servlet that counts the number of times it has been requested,
diff --git a/src/test/java/winstone/testApplication/servlets/UnavailableServlet.java b/src/test/java/winstone/testApplication/servlets/UnavailableServlet.java
index 3e9a5e97..35a5663b 100644
--- a/src/test/java/winstone/testApplication/servlets/UnavailableServlet.java
+++ b/src/test/java/winstone/testApplication/servlets/UnavailableServlet.java
@@ -6,13 +6,13 @@
  */
 package winstone.testApplication.servlets;
 
+import jakarta.servlet.ServletException;
+import jakarta.servlet.UnavailableException;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.Writer;
-import javax.servlet.ServletException;
-import javax.servlet.UnavailableException;
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
 
 /**
  * Used to test the unavailable exception processing