diff --git a/study-micro-services-eureka-client4/pom.xml b/study-micro-services-eureka-client4/pom.xml
index 2f4c9c8..8465737 100644
--- a/study-micro-services-eureka-client4/pom.xml
+++ b/study-micro-services-eureka-client4/pom.xml
@@ -25,7 +25,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <spring.base.version>4.3.9.RELEASE</spring.base.version>
+        <spring.base.version>5.2.20.RELEASE</spring.base.version>
         <junit.base.version>UTF-8</junit.base.version>
         <servlet.base.version>3.0-alpha-1</servlet.base.version>
         <jsp.base.version>2.1</jsp.base.version>