diff --git a/gateway/auth.py b/gateway/auth.py
index caef70b..3756e38 100644
--- a/gateway/auth.py
+++ b/gateway/auth.py
@@ -12,7 +12,7 @@
 from gateway.conf import gateway_settings
 from gateway.models.conf import AuthConfiguration, Token
 
-IDP_ISSUER_URL = urljoin(gateway_settings.IDP_URL, "/".join(["realms", gateway_settings.IDP_REALM]))
+IDP_ISSUER_URL = gateway_settings.IDP_URL.rstrip("/") + "/".join(["realms", gateway_settings.IDP_REALM])
 
 # IDP i.e. Keycloak
 realm_idp_settings = AuthConfiguration(