diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e1c7105..a6ef83d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [unreleased]
+
+### Changed
+- Stop adding ?schema=openid to userinfo endpoint URL. #449
+
 ## [1.0.1] - 2024-09-13
 
 ### Fixed
diff --git a/src/OpenIDConnectClient.php b/src/OpenIDConnectClient.php
index 07c00540..7b859c56 100644
--- a/src/OpenIDConnectClient.php
+++ b/src/OpenIDConnectClient.php
@@ -1261,9 +1261,6 @@ protected function decodeJWT(string $jwt, int $section = 0) {
     public function requestUserInfo(string $attribute = null) {
 
         $user_info_endpoint = $this->getProviderConfigValue('userinfo_endpoint');
-        $schema = 'openid';
-
-        $user_info_endpoint .= '?schema=' . $schema;
 
         //The accessToken has to be sent in the Authorization header.
         // Accept json to indicate response type