diff --git a/p21-springboot-cache-redis/pom.xml b/p21-springboot-cache-redis/pom.xml
index 29206d7..1e5da21 100644
--- a/p21-springboot-cache-redis/pom.xml
+++ b/p21-springboot-cache-redis/pom.xml
@@ -62,7 +62,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.11.1</version>
+            <version>1.4.18</version>
         </dependency>
 
         <!--redis依赖-->