diff --git a/src/vpn_manager_globalprotect/backend.py b/src/vpn_manager_globalprotect/backend.py
index 218f941..198d9a8 100644
--- a/src/vpn_manager_globalprotect/backend.py
+++ b/src/vpn_manager_globalprotect/backend.py
@@ -183,7 +183,7 @@ class GlobalProtectConnection(
                     "(ss)",
                     (
                         base64.b64decode(preauth.get("saml-request")).decode("utf-8"),
-                        options["firefox_browser_container"],
+                        options["firefox_browser_container"].value,
                     ),
                 ),
             )