diff --git a/apps/etterlatte-proxy/build.gradle.kts b/apps/etterlatte-proxy/build.gradle.kts
index 03357576..25035902 100644
--- a/apps/etterlatte-proxy/build.gradle.kts
+++ b/apps/etterlatte-proxy/build.gradle.kts
@@ -32,6 +32,7 @@ dependencies {
     implementation(Cxf.CxfWsSecurity)
     implementation(Micrometer.Prometheus)
     implementation(Jackson.jacksonDatatypejsr310)
+    implementation(Jackson.jacksonXml)
 
     testImplementation(NavFelles.MockOauth2Server)
     testImplementation(Ktor.ServerTests)
diff --git a/apps/etterlatte-proxy/src/main/kotlin/routes/TilbakekrevingRoute.kt b/apps/etterlatte-proxy/src/main/kotlin/routes/TilbakekrevingRoute.kt
index d95b5666..ebb442c8 100644
--- a/apps/etterlatte-proxy/src/main/kotlin/routes/TilbakekrevingRoute.kt
+++ b/apps/etterlatte-proxy/src/main/kotlin/routes/TilbakekrevingRoute.kt
@@ -1,21 +1,26 @@
 package no.nav.etterlatte.routes
 
+import com.fasterxml.jackson.core.JsonGenerator
+import com.fasterxml.jackson.databind.DeserializationFeature
+import com.fasterxml.jackson.databind.JsonSerializer
+import com.fasterxml.jackson.databind.SerializationFeature
+import com.fasterxml.jackson.databind.SerializerProvider
+import com.fasterxml.jackson.databind.module.SimpleModule
+import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule
+import com.fasterxml.jackson.dataformat.xml.XmlMapper
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
+import com.fasterxml.jackson.module.kotlin.KotlinModule
+import com.fasterxml.jackson.module.kotlin.readValue
 import io.ktor.server.application.call
 import io.ktor.server.application.log
-import io.ktor.server.request.receive
 import io.ktor.server.request.receiveText
 import io.ktor.server.response.respond
 import io.ktor.server.routing.Route
 import io.ktor.server.routing.application
 import io.ktor.server.routing.post
-import jakarta.xml.bind.JAXBContext
-import jakarta.xml.bind.Marshaller
 import no.nav.okonomi.tilbakekrevingservice.TilbakekrevingPortType
 import no.nav.okonomi.tilbakekrevingservice.TilbakekrevingsvedtakRequest
-import no.nav.okonomi.tilbakekrevingservice.TilbakekrevingsvedtakResponse
-import java.io.StringWriter
-import javax.xml.stream.XMLInputFactory
-import javax.xml.transform.stream.StreamSource
+import javax.xml.datatype.XMLGregorianCalendar
 
 /**
  * Endepunkter for å integrere med tilbakekrevingstjenesten fra gcp til fss
@@ -27,38 +32,34 @@ fun Route.tilbakekrevingRoute(tilbakekrevingService: TilbakekrevingPortType) {
         val request = call.receiveText()
         logger.info(request)
 
-        val vedtakRequest = toTilbakekrevingsvedtakRequest(request)
-
+        val vedtakRequest: TilbakekrevingsvedtakRequest = xmlMapper.readValue(request)
         logger.info("Videresender tilbakekrevingsvedtak ${vedtakRequest.tilbakekrevingsvedtak.vedtakId} til on-prem")
+
         val response = tilbakekrevingService.tilbakekrevingsvedtak(vedtakRequest)
-        logger.info(toXml(response))
+        logger.info(xmlMapper.writeValueAsString(response))
 
         call.respond(response)
     }
-
-
 }
 
-val jaxbContext = JAXBContext.newInstance(TilbakekrevingsvedtakRequest::class.java)
-val jaxbContextResponse = JAXBContext.newInstance(TilbakekrevingsvedtakResponse::class.java)
-val xmlInputFactory = XMLInputFactory.newInstance()
-
-fun toXml(response: TilbakekrevingsvedtakResponse): String {
-    val marshaller = jaxbContextResponse.createMarshaller()
-    marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true)
+val xmlMapper = XmlMapper(JacksonXmlModule().apply { setDefaultUseWrapper(false) }).apply {
+    registerModule(KotlinModule.Builder().build())
+    registerModule(JavaTimeModule())
+    registerModule(CustomXMLGregorianCalendarModule())
+    disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
+    disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
+}
 
-    val stringWriter = StringWriter()
-    stringWriter.use {
-        marshaller.marshal(response, stringWriter)
+private class CustomXMLGregorianCalendarModule : SimpleModule() {
+    init {
+        addSerializer(XMLGregorianCalendar::class.java, CustomXMLGregorianCalendarSerializer())
     }
 
-    return stringWriter.toString()
-}
-fun toTilbakekrevingsvedtakRequest(xml: String): TilbakekrevingsvedtakRequest {
-    val request =
-        jaxbContext.createUnmarshaller().unmarshal(
-            xmlInputFactory.createXMLStreamReader(StreamSource(xml)),
-            TilbakekrevingsvedtakRequest::class.java,
-        )
-    return request.value
+    private class CustomXMLGregorianCalendarSerializer : JsonSerializer<XMLGregorianCalendar>() {
+        override fun serialize(value: XMLGregorianCalendar?, gen: JsonGenerator, serializers: SerializerProvider) {
+            if (value != null) {
+                gen.writeString(value.toGregorianCalendar().toZonedDateTime().toLocalDate().toString())
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/buildSrc/src/main/kotlin/Constants.kt b/buildSrc/src/main/kotlin/Constants.kt
index a1b1b150..23aec728 100644
--- a/buildSrc/src/main/kotlin/Constants.kt
+++ b/buildSrc/src/main/kotlin/Constants.kt
@@ -34,6 +34,7 @@ object Ktor {
 
 object Jackson {
     const val jacksonDatatypejsr310 = "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.15.0"
+    const val jacksonXml = "com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.15.0"
 }
 
 object Kafka {