diff --git a/src/com/yourcompany/babydatenbank/model/Article.java b/src/com/yourcompany/babydatenbank/model/Article.java
index 7bc108d..db16648 100644
--- a/src/com/yourcompany/babydatenbank/model/Article.java
+++ b/src/com/yourcompany/babydatenbank/model/Article.java
@@ -1,6 +1,7 @@
 package com.yourcompany.babydatenbank.model;
 
 import javax.persistence.*;
+import javax.validation.constraints.*;
 
 import org.hibernate.annotations.GenericGenerator;
 import org.hibernate.validator.constraints.*;
diff --git a/web/WEB-INF/lib/addons.jar b/web/WEB-INF/lib/addons.jar
index 4d10ecc..4b9aae1 100644
Binary files a/web/WEB-INF/lib/addons.jar and b/web/WEB-INF/lib/addons.jar differ