diff --git a/pom.xml b/pom.xml
index 829754f3a871..e1ac9bc151cd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -99,7 +99,7 @@ THE SOFTWARE.
     <bridge-method-injector.version>1.29</bridge-method-injector.version>
     <spotless.check.skip>false</spotless.check.skip>
     <!-- Make sure to keep the jetty-maven-plugin version in war/pom.xml in sync with the Jetty release in Winstone: -->
-    <winstone.version>6.20</winstone.version>
+    <winstone.version>6.21</winstone.version>
   </properties>
 
   <!--