diff --git a/Manifest.json b/Manifest.json
index d262e02..9da0de6 100644
--- a/Manifest.json
+++ b/Manifest.json
@@ -18,7 +18,7 @@
     ],
 
     "version" : "trunk",
-    "qooxdoo-versions": ["1.0","1.1","1.2"]
+    "qooxdoo-versions": ["1.0","1.1","1.2","1.3-pre"]
   },
   
   "provides" :