diff --git a/Courses/2019-Spring-Semester/Tasks/Task-4/pom.xml b/Courses/2019-Spring-Semester/Tasks/Task-4/pom.xml
index 207cc5f..1cdfb1b 100644
--- a/Courses/2019-Spring-Semester/Tasks/Task-4/pom.xml
+++ b/Courses/2019-Spring-Semester/Tasks/Task-4/pom.xml
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.28</version>
+            <version>1.2.83</version>
         </dependency>
     </dependencies>