diff --git a/app/subscription/singbox.py b/app/subscription/singbox.py
index b8d04b73..ab840258 100644
--- a/app/subscription/singbox.py
+++ b/app/subscription/singbox.py
@@ -125,7 +125,7 @@ def ws_config(self, host='', path='', random_user_agent: bool = False,
         if path:
             config["path"] = path
         if host:
-            config["headers"] = {"Host": host}
+            config["headers"]["Host"] = host
         if random_user_agent:
             config["headers"]["User-Agent"] = choice(self.user_agent_list)
         if max_early_data is not None: