diff --git a/Conformance-resources/ACMEGithubProjectPatient.StructureDefinition.xml b/Conformance-resources/ACMEGithubProjectPatient.StructureDefinition.xml
index 4fef1e4..756b63e 100644
--- a/Conformance-resources/ACMEGithubProjectPatient.StructureDefinition.xml
+++ b/Conformance-resources/ACMEGithubProjectPatient.StructureDefinition.xml
@@ -1,53 +1,69 @@
-<?xml version="1.0" encoding="utf-8"?>
-<StructureDefinition xmlns="http://hl7.org/fhir">
-  <id value="ACMEGithubProjectPatient" />
-  <url value="http://fake-acme.org/fhir/StructureDefinition/ACMEGithubProjectPatient" />
-  <name value="ACMEGithubProjectPatient" />
-  <status value="draft" />
-  <fhirVersion value="4.0.1" />
-  <mapping>
-    <identity value="argonaut-dq-dstu2" />
-    <uri value="http://unknown.org/Argonaut-DQ-DSTU2" />
-    <name value="Argonaut-DQ-DSTU2" />
-  </mapping>
-  <mapping>
-    <identity value="rim" />
-    <uri value="http://hl7.org/v3" />
-    <name value="RIM Mapping" />
-  </mapping>
-  <mapping>
-    <identity value="cda" />
-    <uri value="http://hl7.org/v3/cda" />
-    <name value="CDA (R2)" />
-  </mapping>
-  <mapping>
-    <identity value="w5" />
-    <uri value="http://hl7.org/fhir/fivews" />
-    <name value="FiveWs Pattern Mapping" />
-  </mapping>
-  <mapping>
-    <identity value="v2" />
-    <uri value="http://hl7.org/v2" />
-    <name value="HL7 v2 Mapping" />
-  </mapping>
-  <mapping>
-    <identity value="loinc" />
-    <uri value="http://loinc.org" />
-    <name value="LOINC code for the element" />
-  </mapping>
-  <kind value="resource" />
-  <abstract value="false" />
-  <type value="Patient" />
-  <baseDefinition value="https://fake-acme.org/fhir/StructureDefinition/ACME-base-patient" />
-  <derivation value="constraint" />
-  <differential>
-    <element id="Patient.name">
-      <path value="Patient.name" />
-      <max value="1" />
-    </element>
-    <element id="Patient.photo">
-      <path value="Patient.photo" />
-      <max value="0" />
-    </element>
-  </differential>
+<?xml version="1.0" encoding="utf-8"?>
+<StructureDefinition xmlns="http://hl7.org/fhir">
+  <id value="ACMEGithubProjectPatient" />
+  <url value="http://fake-acme.org/fhir/StructureDefinition/ACMEGithubProjectPatient" />
+  <name value="ACMEGithubProjectPatient" />
+  <status value="draft" />
+  <fhirVersion value="4.0.1" />
+  <mapping>
+    <identity value="argonaut-dq-dstu2" />
+    <uri value="http://unknown.org/Argonaut-DQ-DSTU2" />
+    <name value="Argonaut-DQ-DSTU2" />
+  </mapping>
+  <mapping>
+    <identity value="rim" />
+    <uri value="http://hl7.org/v3" />
+    <name value="RIM Mapping" />
+  </mapping>
+  <mapping>
+    <identity value="cda" />
+    <uri value="http://hl7.org/v3/cda" />
+    <name value="CDA (R2)" />
+  </mapping>
+  <mapping>
+    <identity value="w5" />
+    <uri value="http://hl7.org/fhir/fivews" />
+    <name value="FiveWs Pattern Mapping" />
+  </mapping>
+  <mapping>
+    <identity value="v2" />
+    <uri value="http://hl7.org/v2" />
+    <name value="HL7 v2 Mapping" />
+  </mapping>
+  <mapping>
+    <identity value="loinc" />
+    <uri value="http://loinc.org" />
+    <name value="LOINC code for the element" />
+  </mapping>
+  <kind value="resource" />
+  <abstract value="false" />
+  <type value="Patient" />
+  <baseDefinition value="https://fake-acme.org/fhir/StructureDefinition/ACME-base-patient" />
+  <derivation value="constraint" />
+  <differential>
+    <element id="Patient.extension:race">
+      <path value="Patient.extension" />
+      <sliceName value="race" />
+    </element>
+    <element id="Patient.extension:race.extension">
+      <path value="Patient.extension.extension" />
+      <min value="1" />
+    </element>
+    <element id="Patient.extension:ethnicity">
+      <path value="Patient.extension" />
+      <sliceName value="ethnicity" />
+    </element>
+    <element id="Patient.extension:ethnicity.extension">
+      <path value="Patient.extension.extension" />
+      <min value="1" />
+    </element>
+    <element id="Patient.name">
+      <path value="Patient.name" />
+      <max value="2" />
+    </element>
+    <element id="Patient.photo">
+      <path value="Patient.photo" />
+      <max value="0" />
+    </element>
+  </differential>
 </StructureDefinition>
\ No newline at end of file
diff --git a/fhirpkg.lock.json b/fhirpkg.lock.json
index e16bc7c..0e8b22a 100644
--- a/fhirpkg.lock.json
+++ b/fhirpkg.lock.json
@@ -1,9 +1,9 @@
-{
-  "updated": "2021-03-10T11:11:07.302469+01:00",
-  "dependencies": {
-    "acme.base.r4": "4.0.3",
-    "hl7.fhir.us.core": "3.1.0",
-    "hl7.fhir.r4.core": "4.0.1"
-  },
-  "missing": {}
+{
+  "updated": "2024-03-08T13:15:20.0890122+01:00",
+  "dependencies": {
+    "acme.base.r4": "4.0.3",
+    "hl7.fhir.us.core": "3.1.0",
+    "hl7.fhir.r4.core": "4.0.1"
+  },
+  "missing": {}
 }