diff --git a/ch09-enterprise/ch09-enterprise-security/pom.xml b/ch09-enterprise/ch09-enterprise-security/pom.xml
index 6319c6b..0661fd0 100644
--- a/ch09-enterprise/ch09-enterprise-security/pom.xml
+++ b/ch09-enterprise/ch09-enterprise-security/pom.xml
@@ -13,7 +13,7 @@
     <packaging>jar</packaging>
 
     <properties>
-        <spring.boot.version>1.5.7.RELEASE</spring.boot.version>
+        <spring.boot.version>2.5.12</spring.boot.version>
     </properties>
 
     <dependencies>