diff --git a/walkthroughs/week-2-server/examples/subtraction-game/pom.xml b/walkthroughs/week-2-server/examples/subtraction-game/pom.xml
index f493e44..09456e0 100644
--- a/walkthroughs/week-2-server/examples/subtraction-game/pom.xml
+++ b/walkthroughs/week-2-server/examples/subtraction-game/pom.xml
@@ -26,7 +26,7 @@
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
-      <version>2.8.6</version>
+      <version>2.8.9</version>
     </dependency>
   </dependencies>