diff --git a/trunk/global-coordinator/optimizer/pom.xml b/trunk/global-coordinator/optimizer/pom.xml
index df08807..3afa928 100644
--- a/trunk/global-coordinator/optimizer/pom.xml
+++ b/trunk/global-coordinator/optimizer/pom.xml
@@ -92,7 +92,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.2.2</version>
+            <version>2.8.9</version>
             <scope>provided</scope>
         </dependency>