diff --git a/appengine-java11/appengine-simple-jetty-main/pom.xml b/appengine-java11/appengine-simple-jetty-main/pom.xml
index fbc38d30133..ca49450a14b 100644
--- a/appengine-java11/appengine-simple-jetty-main/pom.xml
+++ b/appengine-java11/appengine-simple-jetty-main/pom.xml
@@ -21,7 +21,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.source>11</maven.compiler.source>
     <maven.compiler.target>11</maven.compiler.target>
-    <jetty.version>9.4.54.v20240208</jetty.version>
+    <jetty.version>9.4.55.v20240627</jetty.version>
   </properties>
 
   <!-- [START gae_java11_server_dependencies] -->