diff --git a/chapter12/admin-server/pom.xml b/chapter12/admin-server/pom.xml
old mode 100755
new mode 100644
index 0404f69..17ce629
--- a/chapter12/admin-server/pom.xml
+++ b/chapter12/admin-server/pom.xml
@@ -30,7 +30,7 @@
 		<dependency>
 			<groupId>de.codecentric</groupId>
 			<artifactId>spring-boot-admin-server</artifactId>
-			<version>1.5.1</version>
+			<version>3.1.2</version>
 		</dependency>
 
 		<dependency>