diff --git a/MqttDemo/pom.xml b/MqttDemo/pom.xml
index 7d0a741..270d0c6 100644
--- a/MqttDemo/pom.xml
+++ b/MqttDemo/pom.xml
@@ -20,7 +20,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <fastjson.version>1.2.31</fastjson.version>
+        <fastjson.version>1.2.83</fastjson.version>
         <paho.version>1.2.0</paho.version>
 
     </properties>