diff --git a/db/books.cds b/db/books.cds
index 665587af..48d24ccf 100644
--- a/db/books.cds
+++ b/db/books.cds
@@ -65,5 +65,9 @@ entity Contents: Hierarchy {
         page   : Integer;
         parent : Association to Contents @odata.draft.enclosed;
         book   : Association to Books;
+        // for cascade delete
+        @cascade.delete
+        @odata.draft.enclosed
+        children : Association to many Contents on children.parent = $self;
 }
 
diff --git a/pom.xml b/pom.xml
index e547a030..f9828783 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
 
     <!-- DEPENDENCIES VERSION -->
     <jdk.version>21</jdk.version>
-    <cds.services.version>4.6.1</cds.services.version>
+    <cds.services.version>4.7.0</cds.services.version>
     <cloud.sdk.version>5.26.0</cloud.sdk.version>
     <xsuaa.version>3.6.5</xsuaa.version>
     <cf-java-logging-support.version>3.8.6</cf-java-logging-support.version>