diff --git a/blockchain-part1/pom.xml b/blockchain-part1/pom.xml
index d05e92d..efb14a1 100644
--- a/blockchain-part1/pom.xml
+++ b/blockchain-part1/pom.xml
@@ -21,7 +21,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.2</version>
+            <version>2.8.9</version>
         </dependency>
     </dependencies>
 </project>
\ No newline at end of file