diff --git a/Chapter-11-Spring-Reactive-Web-Functional/pom.xml b/Chapter-11-Spring-Reactive-Web-Functional/pom.xml
index 2f39c694..1d885392 100644
--- a/Chapter-11-Spring-Reactive-Web-Functional/pom.xml
+++ b/Chapter-11-Spring-Reactive-Web-Functional/pom.xml
@@ -65,7 +65,7 @@
 	<dependency>
 		<groupId>org.apache.logging.log4j</groupId>
 		<artifactId>log4j-core</artifactId>
-		<version>2.8</version>
+		<version>2.17.1</version>
 	</dependency>
 	<dependency>
 		<groupId>org.apache.logging.log4j</groupId>