diff --git a/invoker/testfunction/pom.xml b/invoker/testfunction/pom.xml
index 1b42c15c..3fada351 100644
--- a/invoker/testfunction/pom.xml
+++ b/invoker/testfunction/pom.xml
@@ -30,7 +30,7 @@
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
-      <version>28.1-jre</version>
+      <version>29.0-jre</version>
     </dependency>
     <dependency>
       <groupId>com.google.code.gson</groupId>