diff --git a/authorizer-app-backend/src/main/java/org/radarbase/authorizer/api/ApiDeclarations.kt b/authorizer-app-backend/src/main/java/org/radarbase/authorizer/api/ApiDeclarations.kt
index 508e6a42..1253d53b 100644
--- a/authorizer-app-backend/src/main/java/org/radarbase/authorizer/api/ApiDeclarations.kt
+++ b/authorizer-app-backend/src/main/java/org/radarbase/authorizer/api/ApiDeclarations.kt
@@ -55,9 +55,9 @@ data class OuraAuthUserId(
     val age: Int,
     val weight: Float,
     val height: Float,
-    val biological_sex: String,
+    val gender: String,
     val email: String,
-    @SerialName("id") val userId: String,
+    @SerialName("user_id") val userId: String,
 )
 
 data class SignRequestParams(
diff --git a/authorizer-app-backend/src/main/java/org/radarbase/authorizer/service/OuraAuthorizationService.kt b/authorizer-app-backend/src/main/java/org/radarbase/authorizer/service/OuraAuthorizationService.kt
index 928622b7..b1479a69 100644
--- a/authorizer-app-backend/src/main/java/org/radarbase/authorizer/service/OuraAuthorizationService.kt
+++ b/authorizer-app-backend/src/main/java/org/radarbase/authorizer/service/OuraAuthorizationService.kt
@@ -4,10 +4,8 @@ import io.ktor.client.call.body
 import io.ktor.client.request.basicAuth
 import io.ktor.client.request.forms.submitForm
 import io.ktor.client.request.get
-import io.ktor.client.request.headers
 import io.ktor.client.request.url
 import io.ktor.client.statement.bodyAsText
-import io.ktor.http.HttpHeaders
 import io.ktor.http.isSuccess
 import io.ktor.http.takeFrom
 import jakarta.ws.rs.core.Context
@@ -79,9 +77,9 @@ class OuraAuthorizationService(
     private suspend fun getExternalId(accessToken: String): String = withContext(Dispatchers.IO) {
         try {
             val response = httpClient.get {
-                url(OURA_USER_ID_ENDPOINT)
-                headers {
-                    append(HttpHeaders.Authorization, "Bearer $accessToken")
+                url {
+                    takeFrom(OURA_USER_ID_ENDPOINT)
+                    parameters.append("access_token", accessToken)
                 }
             }
             if (response.status.isSuccess()) {
@@ -101,6 +99,6 @@ class OuraAuthorizationService(
     }
 
     companion object {
-        private const val OURA_USER_ID_ENDPOINT = "https://api.ouraring.com/v2/usercollection/personal_info"
+        private const val OURA_USER_ID_ENDPOINT = "https://api.ouraring.com/v1/userinfo"
     }
 }