diff --git a/civicpy/exports/civic_gks_record.py b/civicpy/exports/civic_gks_record.py
index 3146e73..a3d055b 100644
--- a/civicpy/exports/civic_gks_record.py
+++ b/civicpy/exports/civic_gks_record.py
@@ -640,7 +640,20 @@ def get_allele_origin_qualifier(record: Evidence | Assertion) -> MappableConcept
 
         return MappableConcept(
             name=VARIANT_ORIGIN_TO_ALLELE_ORIGIN[variant_origin],
-            extensions=[Extension(name="civic_variant_origin", value=variant_origin)],
+            mappings=[
+                ConceptMapping(
+                    coding=Coding(
+                        code=variant_origin,
+                        system="https://civicdb.org",
+                        iris=[
+                            iriReference(
+                                root="https://civic.readthedocs.io/en/latest/model/evidence/origin.html"
+                            )
+                        ],
+                    ),
+                    relation=Relation.EXACT_MATCH,
+                )
+            ],
         )
 
     @staticmethod
diff --git a/civicpy/tests/test_exports.py b/civicpy/tests/test_exports.py
index cf9c86a..41f23f3 100644
--- a/civicpy/tests/test_exports.py
+++ b/civicpy/tests/test_exports.py
@@ -368,7 +368,18 @@ def gks_therapeutic_proposition(gks_mpid33, gks_gid19, gks_tid146, gks_did8):
         "geneContextQualifier": gks_gid19,
         "alleleOriginQualifier": {
             "name": "somatic",
-            "extensions": [{"name": "civic_variant_origin", "value": "SOMATIC"}],
+            "mappings": [
+                {
+                    "coding": {
+                        "code": "SOMATIC",
+                        "system": "https://civicdb.org",
+                        "iris": [
+                            "https://civic.readthedocs.io/en/latest/model/evidence/origin.html"
+                        ],
+                    },
+                    "relation": "exactMatch",
+                }
+            ],
         },
         "predicate": "predictsSensitivityTo",
         "objectTherapeutic": gks_tid146,