diff --git a/lua/express/misc/finalhandler.lua b/lua/express/misc/finalhandler.lua
index 6c6697b..c314d68 100644
--- a/lua/express/misc/finalhandler.lua
+++ b/lua/express/misc/finalhandler.lua
@@ -32,6 +32,9 @@ local createHtmlDocument = function(message)
 end
 
 local send = function(req, res, status, headers, msg)
+    if res.pg_res._headersSended then
+        return
+    end
 	local body = createHtmlDocument(msg)
 
 	if status then