diff --git a/logout_oidc.php b/logout_oidc.php
index acbc914..e526084 100644
--- a/logout_oidc.php
+++ b/logout_oidc.php
@@ -6,7 +6,7 @@
 session_start();
 $oidc = $_SESSION['oidc'];
 unset($_SESSION['oidc']);
-$oidc -> sign_out($oidc->getIdToken(), "https://ai.lab.hm.edu/logout.php");
+$oidc -> signOut($oidc->getIdToken(), "https://ai.lab.hm.edu/logout.php");