diff --git a/src/mibew/libs/routing.yml b/src/mibew/libs/routing.yml
index 031ac4bc..9d1f34aa 100644
--- a/src/mibew/libs/routing.yml
+++ b/src/mibew/libs/routing.yml
@@ -146,7 +146,7 @@ history_thread:
         _controller: Mibew\Controller\HistoryController::threadAction
         _access_check: Mibew\AccessControl\Check\LoggedInCheck
     requirements:
-        thread_id: \d{1,9}
+        thread_id: \d{1,10}
 
 history_user:
     path: /operator/history/user/{user_id}