diff --git a/application/datamodel.application.xml b/application/datamodel.application.xml
index 9616b1b99..4b335bec9 100644
--- a/application/datamodel.application.xml
+++ b/application/datamodel.application.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.0">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.1">
   <classes>
     <class id="AbstractResource" _delta="define">
       <parent>cmdbAbstractObject</parent>
diff --git a/core/datamodel.core.xml b/core/datamodel.core.xml
index 5bda1228f..c38ec2b54 100644
--- a/core/datamodel.core.xml
+++ b/core/datamodel.core.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.0">
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.1">
   <user_rights>
     <profiles>
       <profile id="1024" _delta="define">