diff --git a/build.gradle b/build.gradle
index 3d212f74..b14efa7c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -77,7 +77,7 @@ dependencies {
     testImplementation 'ca.uhn.hapi.fhir:hapi-fhir-validation:5.5.3'
     testImplementation 'ca.uhn.hapi.fhir:hapi-fhir-validation-resources-dstu3:5.6.1'
     testImplementation 'ca.uhn.hapi.fhir:hapi-fhir-validation-resources-dstu2:5.6.1'
-    testImplementation 'ca.uhn.hapi.fhir:hapi-fhir-validation-resources-r4:5.6.1'
+    testImplementation 'ca.uhn.hapi.fhir:hapi-fhir-validation-resources-r4:6.4.4'
     testImplementation 'com.helger:ph-schematron:5.6.5'
     testImplementation 'com.phloc:phloc-schematron:2.7.1'
     testImplementation 'com.phloc:phloc-commons:4.6.7'