diff --git a/build.gradle b/build.gradle
index 3d212f74..4b1d55b2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -64,7 +64,7 @@ dependencies {
     implementation 'com.google.guava:guava:31.0.1-jre'
     implementation 'ca.uhn.hapi.fhir:hapi-fhir-base:5.6.1'
     implementation 'ca.uhn.hapi.fhir:hapi-fhir-structures-dstu3:5.6.1'
-    implementation 'ca.uhn.hapi.fhir:hapi-fhir-structures-r4:5.6.1'
+    implementation 'ca.uhn.hapi.fhir:hapi-fhir-structures-r4:6.4.4'
     implementation 'com.h2database:h2:1.4.200'
     implementation 'com.auth0:java-jwt:3.18.2'
     implementation 'com.auth0:jwks-rsa:0.20.0'