diff --git a/maven-plugin-tools-model/src/main/mdo/plugin-metadata.mdo b/maven-plugin-tools-model/src/main/mdo/plugin-metadata.mdo
index 89170f8..ea9adf5 100644
--- a/maven-plugin-tools-model/src/main/mdo/plugin-metadata.mdo
+++ b/maven-plugin-tools-model/src/main/mdo/plugin-metadata.mdo
@@ -66,8 +66,10 @@
     </mojos>
   </pluginMetadata>
     -->
-<model xsd.namespace="http://maven.apache.org/PLUGIN-METADATA/1.0.0"
-       xsd.target-namespace="http://maven.apache.org/PLUGIN-METADATA/1.0.0">
+<model xmlns="http://modello.codehaus.org/MODELLO/1.4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://modello.codehaus.org/MODELLO/1.4.0 http://modello.codehaus.org/xsd/modello-1.4.0.xsd"
+       xsd.namespace="http://maven.apache.org/PLUGIN-METADATA/1.0.0"
+       xsd.targetNamespace="http://maven.apache.org/PLUGIN-METADATA/1.0.0">
   <id>plugin-metadata</id>
   <name>PluginMetadata</name>
   <description><![CDATA[