diff --git a/study-micro-services-eureka-client4/pom.xml b/study-micro-services-eureka-client4/pom.xml
index 2f4c9c8..e8e3a2e 100644
--- a/study-micro-services-eureka-client4/pom.xml
+++ b/study-micro-services-eureka-client4/pom.xml
@@ -205,7 +205,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>26.0-jre</version>
+            <version>29.0-jre</version>
             <!-- or, for Android: -->
             <!--<version>27.0.1-android</version>-->
         </dependency>