diff --git a/chapter16/common/pom.xml b/chapter16/common/pom.xml
old mode 100755
new mode 100644
index a18c15b..0bfa21e
--- a/chapter16/common/pom.xml
+++ b/chapter16/common/pom.xml
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.31</version>
+            <version>1.2.83</version>
         </dependency>
     </dependencies>