diff --git a/chapter02/rxjava/pom.xml b/chapter02/rxjava/pom.xml
index b80d830..01a25a2 100644
--- a/chapter02/rxjava/pom.xml
+++ b/chapter02/rxjava/pom.xml
@@ -13,7 +13,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.11</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>