diff --git a/ExtendedRelationOntology.ttl b/ExtendedRelationOntology.ttl
index 8f7ec4c..859c8b6 100644
--- a/ExtendedRelationOntology.ttl
+++ b/ExtendedRelationOntology.ttl
@@ -12,7 +12,7 @@
 
 <http://www.ontologyrepository.com/CommonCoreOntologies/Mid/ExtendedRelationOntology> rdf:type owl:Ontology ;
                                                                                        owl:versionIRI <http://www.ontologyrepository.com/CommonCoreOntologies/Mid/2024-02-14/ExtendedRelationOntology> ;
-                                                                                       owl:imports obo:bfo ;
+                                                                                       owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo-core.ttl> ;
                                                                                        dcterms:license <https://opensource.org/licenses/BSD-3-Clause> ;
                                                                                        rdfs:comment "This ontology is designed to represent many of the relations (i.e. object properties) that hold between entities at the level of the mid-level Common Core Ontologies."@en ;
                                                                                        rdfs:label "Extended Relation Ontology"@en ;
diff --git a/catalog-v001.xml b/catalog-v001.xml
index d5fe61a..f9291c1 100644
--- a/catalog-v001.xml
+++ b/catalog-v001.xml
@@ -7,7 +7,7 @@
     <uri id="User Entered Import Resolution" name="http://www.ontologyrepository.com/CommonCoreOntologies/Mid/QualityOntology" uri="QualityOntology.ttl"/>
     <uri id="User Entered Import Resolution" name="http://www.ontologyrepository.com/CommonCoreOntologies/Mid/CurrencyUnitOntology" uri="CurrencyUnitOntology.ttl"/>
     <uri id="User Entered Import Resolution" name="http://www.ontologyrepository.com/CommonCoreOntologies/Mid/GeospatialOntology" uri="GeospatialOntology.ttl"/>
-    <uri id="User Entered Import Resolution" name="http://purl.obolibrary.org/obo/bfo" uri="imports/bfo-core.ttl"/>
+    <uri id="User Entered Import Resolution" name="http://purl.obolibrary.org/obo/bfo/2020/bfo-core.ttl" uri="imports/bfo-core.ttl"/>
     <uri id="User Entered Import Resolution" name="http://www.ontologyrepository.com/CommonCoreOntologies/Mid/ExtendedRelationOntology" uri="ExtendedRelationOntology.ttl"/>
     <uri id="User Entered Import Resolution" name="http://www.ontologyrepository.com/CommonCoreOntologies/Mid/TimeOntology" uri="TimeOntology.ttl"/>
     <uri id="User Entered Import Resolution" name="http://www.ontologyrepository.com/CommonCoreOntologies/Mid/InformationEntityOntology" uri="InformationEntityOntology.ttl"/>