diff --git a/step1_base/pom.xml b/step1_base/pom.xml
index 7f84ed6..102d65f 100644
--- a/step1_base/pom.xml
+++ b/step1_base/pom.xml
@@ -110,7 +110,7 @@ limitations under the License.
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
-      <version>2.8.2</version>
+      <version>2.8.9</version>
     </dependency>
     <dependency>
       <groupId>com.google.appengine</groupId>