diff --git a/emmo-mlo.ttl b/emmo-mlo.ttl
index b497298b..c26385cf 100644
--- a/emmo-mlo.ttl
+++ b/emmo-mlo.ttl
@@ -8,8 +8,8 @@
 @prefix dcterms: <http://purl.org/dc/terms/> .
 @base <http://emmo.info/emmo-mlo> .
 
-<http://emmo.info/emmo-mlo> rdf:type owl:Ontology ;
-                             owl:versionIRI <http://emmo.info/emmo/1.0.0-beta5/mlo> ;
+<http://emmo.info/emmo/emmo-mlo> rdf:type owl:Ontology ;
+                             owl:versionIRI <http://emmo.info/emmo/1.0.0-beta5/emmo-mlo> ;
                              owl:imports <http://emmo.info/emmo/1.0.0-beta5/disciplines> ;
                              dcterms:abstract """Elementary Multiperspective Material Ontology (EMMO)
 
diff --git a/emmo-tlo.ttl b/emmo-tlo.ttl
index d01f4a9a..a8f51e24 100644
--- a/emmo-tlo.ttl
+++ b/emmo-tlo.ttl
@@ -6,10 +6,10 @@
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 @prefix skos: <http://www.w3.org/2004/02/skos/core#> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
-@base <http://emmo.info/emmo-tlo> .
+@base <http://emmo.info/emmo/emmo-tlo> .
 
-<http://emmo.info/emmo-tlo> rdf:type owl:Ontology ;
-                         owl:versionIRI <http://emmo.info/emmo/1.0.0-beta5/tlo> ;
+<http://emmo.info/emmo/emmo-tlo> rdf:type owl:Ontology ;
+                         owl:versionIRI <http://emmo.info/emmo/1.0.0-beta5/emmo-tlo> ;
                          owl:imports <http://emmo.info/emmo/1.0.0-beta5/perspectives> ;
                          dcterms:abstract """Elementary Multiperspective Material Ontology (EMMO)