diff --git a/api/src/Authentication/Type/OIDC.php b/api/src/Authentication/Type/OIDC.php
index ecda25e9c..ff538d58d 100644
--- a/api/src/Authentication/Type/OIDC.php
+++ b/api/src/Authentication/Type/OIDC.php
@@ -44,9 +44,9 @@ private function getUser($token)
         global $sso_user_key;
         
         $ch = curl_init();
-        curl_setopt($ch, CURLOPT_URL, $this->getProviderConfig()->userinfo_endpoint);
-        curl_setopt($ch, CURLOPT_HEADER, 0);
-        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: Bearer ' . $token));
+        curl_setopt($ch, CURLOPT_URL, $this->getProviderConfig()->introspection_endpoint);
+        curl_setopt($ch, CURLOPT_POSTFIELDS, array('token' => $token));
+        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: Basic ' . $this->getProviderConfig()->b64ClientCreds));
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
         $response = curl_exec($ch);
         curl_close($ch);