diff --git a/cyclonedx.go b/cyclonedx.go
index 55574e9..12e2f26 100644
--- a/cyclonedx.go
+++ b/cyclonedx.go
@@ -243,17 +243,23 @@ const (
 	ERTypeChat                    ExternalReferenceType = "chat"
 	ERTypeCodifiedInfrastructure  ExternalReferenceType = "codified-infrastructure"
 	ERTypeComponentAnalysisReport ExternalReferenceType = "component-analysis-report"
+	ERTypeConfiguration           ExternalReferenceType = "configuration"
 	ERTypeDistribution            ExternalReferenceType = "distribution"
 	ERTypeDistributionIntake      ExternalReferenceType = "distribution-intake"
 	ERTypeDocumentation           ExternalReferenceType = "documentation"
 	ERTypeDynamicAnalysisReport   ExternalReferenceType = "dynamic-analysis-report"
+	ERTypeEvidence                ExternalReferenceType = "evidence"
 	ERTypeExploitabilityStatement ExternalReferenceType = "exploitability-statement"
+	ERTypeFormulation             ExternalReferenceType = "formulation"
 	ERTypeIssueTracker            ExternalReferenceType = "issue-tracker"
 	ERTypeLicense                 ExternalReferenceType = "license"
+	ERTypeLog                     ExternalReferenceType = "log"
 	ERTypeMailingList             ExternalReferenceType = "mailing-list"
 	ERTypeMaturityReport          ExternalReferenceType = "maturity-report"
+	ERTypeModelCard               ExternalReferenceType = "model-card"
 	ERTypeOther                   ExternalReferenceType = "other"
 	ERTypePentestReport           ExternalReferenceType = "pentest-report"
+	ERTypePoam                    ExternalReferenceType = "poam"
 	ERTypeQualityMetrics          ExternalReferenceType = "quality-metrics"
 	ERTypeReleaseNotes            ExternalReferenceType = "release-notes"
 	ERTypeRiskAssessment          ExternalReferenceType = "risk-assessment"