update jetty
diff --git a/tobago-example/pom.xml b/tobago-example/pom.xml
index 5ad0e30..fdf0097 100644
--- a/tobago-example/pom.xml
+++ b/tobago-example/pom.xml
@@ -84,7 +84,7 @@
         <plugin>
           <groupId>org.eclipse.jetty</groupId>
           <artifactId>jetty-maven-plugin</artifactId>
-          <version>9.4.14.v20181114</version>
+          <version>9.4.20.v20190813</version>
           <configuration>
             <!--
             to run the webapp in jetty in development mode use