diff --git a/pom.xml b/pom.xml
index 5cadf6cae..8ad40e100 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
   </parent>
   <groupId>org.springframework.samples</groupId>
   <artifactId>spring-petclinic</artifactId>
-  <version>5.1.0-SNAPSHOT</version>
+  <version>4.0.0-SNAPSHOT</version>
   <name>petclinic</name>
 
   <properties>
@@ -17,7 +17,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <!-- Important for reproducible builds. Update using e.g. ./mvnw versions:set -DnewVersion=... -->
-    <project.build.outputTimestamp>2025-12-21T22:11:08Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2024-11-28T14:37:52Z</project.build.outputTimestamp>
 
     <!-- Web dependencies -->
     <webjars-locator.version>1.1.2</webjars-locator.version>
@@ -376,7 +376,7 @@
                         </goals>
                       </pluginExecutionFilter>
                       <action>
-                        <ignore />
+                        <ignore></ignore>
                       </action>
                     </pluginExecution>
                     <pluginExecution>
@@ -389,7 +389,7 @@
                         </goals>
                       </pluginExecutionFilter>
                       <action>
-                        <ignore />
+                        <ignore></ignore>
                       </action>
                     </pluginExecution>
                     <pluginExecution>
@@ -402,7 +402,7 @@
                         </goals>
                       </pluginExecutionFilter>
                       <action>
-                        <ignore />
+                        <ignore></ignore>
                       </action>
                     </pluginExecution>
                   </pluginExecutions>