diff --git a/ontology/saref4envi.ttl b/ontology/saref4envi.ttl
index 9ce47814ffda3005b4ee0f470c2102aaf42e0940..84946fde0ce41cd8e4c6a2614832931385c6c360 100644
--- a/ontology/saref4envi.ttl
+++ b/ontology/saref4envi.ttl
@@ -13,22 +13,26 @@
 @base <https://saref.etsi.org/saref4envi/> .
 
 <https://saref.etsi.org/saref4envi/> rdf:type owl:Ontology ;
-                                      owl:versionIRI <https://saref.etsi.org/saref4envi/v1.1.2/> ;
+                                      owl:versionIRI <https://saref.etsi.org/saref4envi/v1.2.1/> ;
                                       dcterms:description "This ontology extends the SAREF ontology for the environment domain, specifically for the light pollution domain, including concepts like photometers, light, etc."@en ;
                                       dcterms:publisher <https://www.etsi.org/> ;
                                       dcterms:title "SAREF extension for environment"@en ;
                                       dcterms:issued "2020-06-05"^^xsd:date ;
-                                      dcterms:modified "2020-06-05"^^xsd:date ;
-                                      dcterms:creator <http://purl.org/net/mpoveda> ,
-                                                      <http://www.garcia-castro.com/foaf.rdf#me> ;
+                                      dcterms:modified "2024-01-25"^^xsd:date ;
+                                      dcterms:creator <http://purl.org/net/mpoveda> ;
+                                      dcterms:creator <http://www.garcia-castro.com/foaf.rdf#me> ;
+                                      dcterms:contributor <http://maxime-lefrancois.info/me#> ;
                                       dcterms:license <https://forge.etsi.org/etsi-software-license> ;
                                       vann:preferredNamespacePrefix "s4envi" ;
                                       vann:preferredNamespaceUri "https://saref.etsi.org/saref4envi/" ;
+                                      rdfs:comment """Information about changes compared to version 1.1.2: 
+ - See https://saref.etsi.org/sources/saref4envi/-/milestones/1"""@en ;
                                       rdfs:comment """Information about changes compared to version 1.1.1: 
  - Updated namespaces for compatibility with SAREF v3."""@en ;
+                                      owl:imports <https://saref.etsi.org/core/v3.2.1/> ; # should be v4.1.1 in the future.
  dcterms:source <https://saref.etsi.org/sources/saref4envi/> ;
- rdfs:seeAlso <https://www.etsi.org/deliver/etsi_ts/103400_103499/10341002/01.01.02_60/ts_10341002v010102p.pdf> ;
-                                      owl:versionInfo "v1.1.2" .
+ rdfs:seeAlso <https://www.etsi.org/deliver/etsi_ts/103400_103499/10341002/02.01.01_60/ts_10341002v020101p.pdf> ;
+                                      owl:versionInfo "v2.1.1" .
 
 #################################################################
 #    Annotation properties