diff --git a/java_demo/pom.xml b/java_demo/pom.xml
index dbc8cf6..8e32bb4 100644
--- a/java_demo/pom.xml
+++ b/java_demo/pom.xml
@@ -39,7 +39,7 @@
   </repositories>
   <properties>
     <java.version>1.7</java.version>
-    <gson-version>2.8.1</gson-version>
+    <gson-version>2.8.9</gson-version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
   </properties>