diff --git a/bigquery-appengine-sample/pom.xml b/bigquery-appengine-sample/pom.xml
index f1a19dbf..75cc13ff 100644
--- a/bigquery-appengine-sample/pom.xml
+++ b/bigquery-appengine-sample/pom.xml
@@ -215,7 +215,7 @@
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
-      <version>2.1</version>
+      <version>2.8.9</version>
     </dependency>
     <dependency>
       <groupId>net.sf.jsr107cache</groupId>