diff --git a/log4shell-goof/log4shell-server/pom.xml b/log4shell-goof/log4shell-server/pom.xml
index e1493c7ea..283fe1442 100644
--- a/log4shell-goof/log4shell-server/pom.xml
+++ b/log4shell-goof/log4shell-server/pom.xml
@@ -30,7 +30,7 @@
     <dependency>
       <groupId>io.undertow</groupId>
       <artifactId>undertow-core</artifactId>
-      <version>2.3.6.Final</version>
+      <version>2.3.9.Final</version>
     </dependency>
     <dependency>
       <groupId>commons-collections</groupId>