diff --git a/html/modules/custom/ghi_content/src/RemoteSource/RemoteSourceBaseHpcContentModule.php b/html/modules/custom/ghi_content/src/RemoteSource/RemoteSourceBaseHpcContentModule.php
index 5fccc5df2..6edf54193 100644
--- a/html/modules/custom/ghi_content/src/RemoteSource/RemoteSourceBaseHpcContentModule.php
+++ b/html/modules/custom/ghi_content/src/RemoteSource/RemoteSourceBaseHpcContentModule.php
@@ -208,7 +208,8 @@ public function searchArticlesByTitle($title) {
   public function query($payload) {
     $body = '{"query": "query ' . str_replace("\n", " ", addslashes(trim($payload))) . '"}';
     $headers = [
-      'Content-type: application/json',
+      'Content-type' => 'application/json',
+      'Apollo-Require-Preflight' => 'true',
     ];
     if ($basic_auth = $this->getRemoteBasicAuth()) {
       $headers['Authorization'] = 'Basic ' . base64_encode($basic_auth['user'] . ':' . $basic_auth['pass']);