diff --git a/hessianSer/pom.xml b/hessianSer/pom.xml
index 54553d5..c90a4a9 100644
--- a/hessianSer/pom.xml
+++ b/hessianSer/pom.xml
@@ -41,7 +41,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>dubbo</artifactId>
-            <version>2.5.3</version>
+            <version>2.6.9</version>
         </dependency>
         <dependency>
             <groupId>org.javassist</groupId>