diff --git a/chapter06_activiti6/pom.xml b/chapter06_activiti6/pom.xml
index 1b32268..f626108 100644
--- a/chapter06_activiti6/pom.xml
+++ b/chapter06_activiti6/pom.xml
@@ -50,7 +50,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>24.0-jre</version>
+            <version>24.1.1-jre</version>
         </dependency>
         <dependency>
             <groupId>org.activiti</groupId>