diff --git a/Chapter-11-Spring-Reactive-Web-Functional/pom.xml b/Chapter-11-Spring-Reactive-Web-Functional/pom.xml
index 2f39c69..56667fe 100644
--- a/Chapter-11-Spring-Reactive-Web-Functional/pom.xml
+++ b/Chapter-11-Spring-Reactive-Web-Functional/pom.xml
@@ -50,7 +50,7 @@
 	<dependency>
 		<groupId>org.apache.tomcat.embed</groupId>
 		<artifactId>tomcat-embed-core</artifactId>
-		<version>8.5.40</version>
+		<version>8.5.50</version>
 	</dependency>
 	<dependency>
 		<groupId>org.springframework</groupId>