diff --git a/src/lib/middleware.ts b/src/lib/middleware.ts
index 865a6f3d..5796009b 100644
--- a/src/lib/middleware.ts
+++ b/src/lib/middleware.ts
@@ -8,6 +8,7 @@ import { findSession } from 'lib/session';
 import {
   badRequest,
   createMiddleware,
+  forbidden,
   parseSecureToken,
   tooManyRequest,
   unauthorized,
@@ -38,6 +39,9 @@ export const useSession = createMiddleware(async (req, res, next) => {
     if (e.message === 'Usage Limit.') {
       return tooManyRequest(res, e.message);
     }
+    if (e.message.startsWith('Website not found:')) {
+      return forbidden(res, e.message);
+    }
     return badRequest(res, e.message);
   }