diff --git a/src/sib-auth.js b/src/sib-auth.js
index a9dd52b3503827898124f1a05ea3743be2acd52e..7a2ba3bd2b88af2e81c16166352a33cdc6d0510c 100644
--- a/src/sib-auth.js
+++ b/src/sib-auth.js
@@ -237,7 +237,7 @@ class SIBAuth extends HTMLElement {
       .then(() => {
         // Create an iframe to logout the user from the server
         const iframe = document.createElement('iframe');
-        iframe.src = `${this.getFavoriteProvider().attributes['data-authority'].value}/auth/logout/`;
+        iframe.src = `${this.getFavoriteProvider().attributes['data-authority'].value}auth/logout/`;
         iframe.style = 'display: none;';
         iframe.width = 1;
         iframe.height = 1;