diff --git a/spring-boot-servlet-example/pom.xml b/spring-boot-servlet-example/pom.xml
index 23f6ac5..a759963 100644
--- a/spring-boot-servlet-example/pom.xml
+++ b/spring-boot-servlet-example/pom.xml
@@ -84,7 +84,7 @@
     <dependency>
       <groupId>org.apache.tomcat.embed</groupId>
       <artifactId>tomcat-embed-core</artifactId>
-      <version>8.5.29</version>
+      <version>8.5.40</version>
     </dependency>
   </dependencies>