diff --git a/doxia-site-renderer/src/main/java/org/apache/maven/doxia/siterenderer/DefaultSiteRenderer.java b/doxia-site-renderer/src/main/java/org/apache/maven/doxia/siterenderer/DefaultSiteRenderer.java
index 8a8fdc1..cd60813 100644
--- a/doxia-site-renderer/src/main/java/org/apache/maven/doxia/siterenderer/DefaultSiteRenderer.java
+++ b/doxia-site-renderer/src/main/java/org/apache/maven/doxia/siterenderer/DefaultSiteRenderer.java
@@ -803,7 +803,7 @@
                     skinModel.getPrerequisites() == null ? null : skinModel.getPrerequisites().getDoxiaSitetools();
 
                 Package p = DefaultSiteRenderer.class.getPackage();
-                String current = ( p == null ) ? null : p.getSpecificationVersion();
+                String current = ( p == null ) ? null : p.getImplementationVersion();
 
                 if ( StringUtils.isNotBlank( toolsPrerequisite ) && ( current != null )
                     && !matchVersion( current, toolsPrerequisite ) )