diff --git a/ssmlearn/do/complaint_ssm/complaint_ssm/pom.xml b/ssmlearn/do/complaint_ssm/complaint_ssm/pom.xml
index 5984c57..4967ff1 100644
--- a/ssmlearn/do/complaint_ssm/complaint_ssm/pom.xml
+++ b/ssmlearn/do/complaint_ssm/complaint_ssm/pom.xml
@@ -14,7 +14,7 @@
   <url>http://www.example.com</url>
 
   <properties>
-    <spring.version>4.1.3.RELEASE</spring.version>
+    <spring.version>5.2.20.RELEASE</spring.version>
     <pagehelper.version>5.1.2-beta</pagehelper.version>
     <mysql.version>5.1.6</mysql.version>
     <mybatis.spring.version>1.2.3</mybatis.spring.version>