diff --git a/demo-server/pom.xml b/demo-server/pom.xml
index ea3d4b7..c5037b9 100644
--- a/demo-server/pom.xml
+++ b/demo-server/pom.xml
@@ -46,7 +46,7 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>27.0-jre</version>
+      <version>29.0-jre</version>
       <scope>compile</scope>
     </dependency>
     <dependency>