diff --git a/3_rxjava/pom.xml b/3_rxjava/pom.xml
index 545f5e6..0bb358f 100644
--- a/3_rxjava/pom.xml
+++ b/3_rxjava/pom.xml
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.6</version>
+            <version>2.8.9</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/javax.annotation/javax.annotation-api -->
         <dependency>