diff --git a/p23-springboot-async/pom.xml b/p23-springboot-async/pom.xml
index 857b796..e13f864 100644
--- a/p23-springboot-async/pom.xml
+++ b/p23-springboot-async/pom.xml
@@ -62,7 +62,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.11.1</version>
+            <version>1.4.17</version>
         </dependency>
 
         <dependency>