diff --git a/ontology/anzsml-core.ttl b/ontology/anzsml-core.ttl
index bf75a68..134f72f 100644
--- a/ontology/anzsml-core.ttl
+++ b/ontology/anzsml-core.ttl
@@ -3,7 +3,7 @@
 @prefix gsp:   <http://www.opengis.net/ont/geosparql#> .
 @prefix rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix owl:   <http://www.w3.org/2002/07/owl#> .
-@prefix anzsml: <https://soilmlie.org/def/soilml#/anzsml#> .
+@prefix anzsml: <https://anzsml.org/def/anzsml-core#> .
 @prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .
 @prefix skos:  <http://www.w3.org/2004/02/skos/core#> .
 @prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .