diff --git a/reviews/srv/reviews-service.cds b/reviews/srv/reviews-service.cds
index eb26d9ae..6e026b99 100644
--- a/reviews/srv/reviews-service.cds
+++ b/reviews/srv/reviews-service.cds
@@ -17,7 +17,7 @@ service ReviewsService {
   annotate Reviews with {
     subject  @mandatory;
     title    @mandatory;
-    rating   @assert.enum;
+    rating   @assert.range;
   }
 
 }