diff --git a/src/main/java/org/cyclonedx/model/ExternalReference.java b/src/main/java/org/cyclonedx/model/ExternalReference.java
index 9f908192f..42df6b8bc 100644
--- a/src/main/java/org/cyclonedx/model/ExternalReference.java
+++ b/src/main/java/org/cyclonedx/model/ExternalReference.java
@@ -59,6 +59,8 @@ public enum Type {
         DOCUMENTATION("documentation"),
         @JsonProperty("support")
         SUPPORT("support"),
+        @JsonProperty("source-distribution")
+        SOURCE_DISTRIBUTION("source-distribution"),
         @JsonProperty("distribution")
         DISTRIBUTION("distribution"),
         @JsonProperty("distribution-intake")
@@ -113,6 +115,8 @@ public enum Type {
         EVIDENCE("evidence"),
         @JsonProperty("formulation")
         FORMULATION("formulation"),
+        @JsonProperty("rfc-9116")
+        RFC_9116("rfc-9116"),
         @JsonProperty("other")
         OTHER("other");