diff --git a/TreeFunction/pom.xml b/TreeFunction/pom.xml
index 6872b34..5648de9 100644
--- a/TreeFunction/pom.xml
+++ b/TreeFunction/pom.xml
@@ -24,7 +24,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.5</version>
+            <version>2.8.9</version>
         </dependency>
         <!-- http://mvnrepository.com/artifact/commons-io/commons-io -->
         <dependency>