diff --git a/start-site/src/main/resources/application.yml b/start-site/src/main/resources/application.yml
index 4464c54776..f471bc4bb8 100644
--- a/start-site/src/main/resources/application.yml
+++ b/start-site/src/main/resources/application.yml
@@ -153,7 +153,7 @@ initializr:
         versionProperty: timefold-solver.version
         mappings:
           - compatibilityRange: "[3.0.0,3.3.0-M1)"
-            version: 1.8.0
+            version: 1.9.0
       vaadin:
         groupId: com.vaadin
         artifactId: vaadin-bom