diff --git a/public/vocab/emblem/rdk.rdf b/public/vocab/emblem/rdk.rdf
index 8edec4f0471317ed96b196119982294a0d6b176e..85113178fb2fd1bb393a6e26dae5467536dfa7b8 100644
--- a/public/vocab/emblem/rdk.rdf
+++ b/public/vocab/emblem/rdk.rdf
@@ -1,5 +1,5 @@
 <rdf:RDF xmlns:dct="http://purl.org/dc/terms/"
-         xmlns:owl="http://www.w3.org/2002/07/owl#"
+         xmlns:org="http://www.w3.org/ns/org#"
          xmlns:skos="http://www.w3.org/2004/02/skos/core#"
          xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
   <skos:ConceptScheme rdf:about="http://uri.hab.de/vocab/emblem/rdk">