diff --git a/EventOntology.ttl b/EventOntology.ttl
index b75e06ed..15684a5e 100644
--- a/EventOntology.ttl
+++ b/EventOntology.ttl
@@ -1249,7 +1249,7 @@ cco:Cause rdf:type owl:Class ;
           owl:equivalentClass [ owl:intersectionOf ( obo:BFO_0000015
                                                      [ rdf:type owl:Restriction ;
                                                        owl:onProperty cco:is_cause_of ;
-                                                       owl:someValuesFrom obo:BFO_0000003
+                                                       owl:someValuesFrom obo:BFO_0000015
                                                      ]
                                                    ) ;
                                 rdf:type owl:Class
@@ -1444,7 +1444,7 @@ cco:Effect rdf:type owl:Class ;
            owl:equivalentClass [ owl:intersectionOf ( obo:BFO_0000015
                                                       [ rdf:type owl:Restriction ;
                                                         owl:onProperty cco:caused_by ;
-                                                        owl:someValuesFrom obo:BFO_0000003
+                                                        owl:someValuesFrom obo:BFO_0000015
                                                       ]
                                                     ) ;
                                  rdf:type owl:Class