diff --git a/vocabularies/ContactCharacterBoreholes.ttl b/vocabularies/ContactCharacterBoreholes.ttl
index 40cee2a..c8a3a37 100644
--- a/vocabularies/ContactCharacterBoreholes.ttl
+++ b/vocabularies/ContactCharacterBoreholes.ttl
@@ -1,36 +1,36 @@
-@prefix cs: <http://pid.geoscience.gov.au/def/voc/ga/contact_character> .
+@prefix cs: <https://pid.geoscience.gov.au/def/voc/ga/contact_character> .
 @prefix dcat: <http://www.w3.org/ns/dcat#> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 
-<http://pid.geoscience.gov.au/def/voc/ga/contact_character/gradational> a skos:Concept ;
+<https://pid.geoscience.gov.au/def/voc/ga/contact_character/gradational> a skos:Concept ;
     dcterms:identifier "gradational"^^xsd:token ;
-    skos:broader <http://pid.geoscience.gov.au/def/voc/ga/contact_character/diffuse> ;
+    skos:broader <https://pid.geoscience.gov.au/def/voc/ga/contact_character/diffuse> ;
     skos:definition "The contact from one geological unit to another is diffuse, by a gradual and consistent change generally in one direction of grainsize or composition, such that a sharp boundary cannot be defined."@en ;
     skos:inScheme cs: ;
     skos:prefLabel "gradational"@en .
 
-<http://pid.geoscience.gov.au/def/voc/ga/contact_character/interfingering> a skos:Concept ;
+<https://pid.geoscience.gov.au/def/voc/ga/contact_character/interfingering> a skos:Concept ;
     dcterms:identifier "interfingering"^^xsd:token ;
     skos:definition "A geological unit contact that is formed over some distance by interfingering of parts of one unit with the adjacent unit."@en ;
     skos:inScheme cs: ;
     skos:prefLabel "interfingering"@en ;
     skos:topConceptOf cs: .
 
-<http://pid.geoscience.gov.au/def/voc/ga/contact_character/sharp> a skos:Concept ;
+<https://pid.geoscience.gov.au/def/voc/ga/contact_character/sharp> a skos:Concept ;
     dcterms:identifier "sharp"^^xsd:token ;
     skos:definition "The contact between geological units is sharp or easily defined at a single interface."@en ;
     skos:inScheme cs: ;
     skos:prefLabel "sharp"@en ;
     skos:topConceptOf cs: .
 
-<http://pid.geoscience.gov.au/def/voc/ga/contact_character/diffuse> a skos:Concept ;
+<https://pid.geoscience.gov.au/def/voc/ga/contact_character/diffuse> a skos:Concept ;
     dcterms:identifier "diffuse"^^xsd:token ;
     skos:definition "The contact between two geological units cannot be defined at a sharp interface.  The transition from one unit to another may be gradational (ie, exhibiting a consistent change in grainsize or composition), may involve irregular mixing of units, or may be obscured by alteration."@en ;
     skos:inScheme cs: ;
-    skos:narrower <http://pid.geoscience.gov.au/def/voc/ga/contact_character/gradational> ;
+    skos:narrower <https://pid.geoscience.gov.au/def/voc/ga/contact_character/gradational> ;
     skos:prefLabel "diffuse"@en ;
     skos:topConceptOf cs: .
 
@@ -43,9 +43,9 @@ cs: a skos:ConceptScheme ;
     dcterms:publisher <https://linked.data.gov.au/org/ga> ;
     owl:versionInfo "1" ;
     skos:definition "Terms to describe the character of a contact between two geological units."@en ;
-    skos:hasTopConcept <http://pid.geoscience.gov.au/def/voc/ga/contact_character/diffuse>,
-        <http://pid.geoscience.gov.au/def/voc/ga/contact_character/interfingering>,
-        <http://pid.geoscience.gov.au/def/voc/ga/contact_character/sharp> ;
+    skos:hasTopConcept <https://pid.geoscience.gov.au/def/voc/ga/contact_character/diffuse>,
+        <https://pid.geoscience.gov.au/def/voc/ga/contact_character/interfingering>,
+        <https://pid.geoscience.gov.au/def/voc/ga/contact_character/sharp> ;
     skos:prefLabel "Field Geology - Contact Character"@en ;
     dcat:contactPoint "Team Lead - Information Services; Energy, Minerals and Groundwater Division" .