diff --git a/ontology/saref4ehaw.ttl b/ontology/saref4ehaw.ttl
index 8a0b339975b7589169f5cef707f61d5523d1eeea..884fc7987a812843aabb077c54d9b3688fb86369 100644
--- a/ontology/saref4ehaw.ttl
+++ b/ontology/saref4ehaw.ttl
@@ -7,7 +7,7 @@
 @prefix vann: <http://purl.org/vocab/vann/> .
 @prefix voaf: <http://purl.org/vocommons/voaf#> .
 @prefix saref: <https://saref.etsi.org/saref/core/> .
-@prefix s4ehaw: <https://saref.etsi.org/core/v3.1.1/> .
+@prefix s4ehaw: <https://saref.etsi.org/saref4ehaw/> .
 @prefix s4envi: <https://saref.etsi.org/saref4envi/> .
 @prefix s4wear: <https://saref.etsi.org/saref4wear/> .
 @prefix dcterms: <http://purl.org/dc/terms/> .