diff --git a/uco-observable/observable.ttl b/uco-observable/observable.ttl
index e8c35be9..1733b143 100644
--- a/uco-observable/observable.ttl
+++ b/uco-observable/observable.ttl
@@ -4379,6 +4379,10 @@ observable:ProfileFacet
 			sh:maxCount "1"^^xsd:integer ;
 			sh:path observable:profileService ;
 		] ,
+		[
+			sh:maxCount "1"^^xsd:integer ;
+			sh:path observable:profileWebsite ;
+		] ,
 		[
 			sh:minCount "0"^^xsd:integer ;
 			sh:path observable:profileLanguage ;