diff --git a/code/ZookeeperDemo/pom.xml b/code/ZookeeperDemo/pom.xml
index 2aa8015..e36c372 100644
--- a/code/ZookeeperDemo/pom.xml
+++ b/code/ZookeeperDemo/pom.xml
@@ -29,7 +29,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>29.0-jre</version>
+            <version>32.0.0-jre</version>
         </dependency>
 
         <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->