diff --git a/psi-ms.owl b/psi-ms.owl
index bd86c3b..d97749e 100644
--- a/psi-ms.owl
+++ b/psi-ms.owl
@@ -34,7 +34,7 @@
      xmlns:ncbitaxon="http://purl.obolibrary.org/obo/ncbitaxon#"
      xmlns:caloha-reqs-vetted="http://purl.obolibrary.org/obo/caloha-reqs-vetted#">
     <owl:Ontology rdf:about="http://purl.obolibrary.org/obo/ms.owl">
-        <owl:versionIRI rdf:resource="http://purl.obolibrary.org/obo/ms/4.1.122/ms.owl"/>
+        <owl:versionIRI rdf:resource="http://purl.obolibrary.org/obo/ms/4.1.123/ms.owl"/>
         <owl:imports rdf:resource="http://purl.obolibrary.org/obo/pato.owl"/>
         <owl:imports rdf:resource="http://purl.obolibrary.org/obo/stato.owl"/>
         <oboInOwl:NamespaceIdRule rdf:datatype="http://www.w3.org/2001/XMLSchema#string">* MS:$sequence(7,0,9999999)$</oboInOwl:NamespaceIdRule>
@@ -66916,6 +66916,7 @@
     <!-- http://purl.obolibrary.org/obo/MS_1003221 -->
 
     <owl:Class rdf:about="http://purl.obolibrary.org/obo/MS_1003221">
+        <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/MS_1003213"/>
         <rdfs:subClassOf rdf:resource="http://purl.obolibrary.org/obo/MS_1003214"/>
         <obo:IAO_0000115 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Mass spectrometer data acquisition method wherein MSn spectra are triggered based on the m/z of precursor ions detected in the same run.</obo:IAO_0000115>
         <oboInOwl:hasExactSynonym rdf:datatype="http://www.w3.org/2001/XMLSchema#string">DDA</oboInOwl:hasExactSynonym>