diff --git a/jiotty-bom/pom.xml b/jiotty-bom/pom.xml
index 38b220b..622335d 100644
--- a/jiotty-bom/pom.xml
+++ b/jiotty-bom/pom.xml
@@ -168,7 +168,7 @@
             <dependency>
                 <groupId>com.google.guava</groupId>
                 <artifactId>guava</artifactId>
-                <version>31.1-jre</version>
+                <version>32.0.0-jre</version>
             </dependency>
             <dependency>
                 <groupId>com.sparkjava</groupId>