diff --git a/keep-ui/auth.ts b/keep-ui/auth.ts
index 3c7576ae8..2a668d5e7 100644
--- a/keep-ui/auth.ts
+++ b/keep-ui/auth.ts
@@ -191,7 +191,7 @@ const providerConfigs = {
         },
       },
       // see https://authjs.dev/guides/corporate-proxy
-      [customFetch]: proxyFetch,
+      ...(proxyFetch && { [customFetch]: proxyFetch }),
     }),
   ],
 };