diff --git a/30-spring-rest-demo/pom.xml b/30-spring-rest-demo/pom.xml
old mode 100755
new mode 100644
index c29d157..200f845
--- a/30-spring-rest-demo/pom.xml
+++ b/30-spring-rest-demo/pom.xml
@@ -33,7 +33,7 @@
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>
-			<version>2.9.10.3</version>
+			<version>2.12.7.1</version>
 		</dependency>
 
 		<!-- Add Servlet support for Spring's AbstractAnnotationConfigDispatcherServletInitializer -->