diff --git a/ch11-monitor/ch11-monitor-actuator/pom.xml b/ch11-monitor/ch11-monitor-actuator/pom.xml
index c86729f..ac92284 100644
--- a/ch11-monitor/ch11-monitor-actuator/pom.xml
+++ b/ch11-monitor/ch11-monitor-actuator/pom.xml
@@ -13,7 +13,7 @@
     <packaging>jar</packaging>
 
     <properties>
-        <spring.boot.version>1.5.0.RELEASE</spring.boot.version>
+        <spring.boot.version>2.5.12</spring.boot.version>
     </properties>
 
     <dependencies>