diff --git a/demos/archunit-guardrails/pom.xml b/demos/archunit-guardrails/pom.xml
index e233162..5e2d6ba 100644
--- a/demos/archunit-guardrails/pom.xml
+++ b/demos/archunit-guardrails/pom.xml
@@ -8,7 +8,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.0</version>
+        <version>3.5.16</version>
         <relativePath/>
     </parent>
 
@@ -21,6 +21,7 @@
     <properties>
         <java.version>21</java.version>
         <archunit.version>1.4.1</archunit.version>
+        <tomcat.version>10.1.59</tomcat.version>
     </properties>
 
     <dependencies>