diff --git a/internal/http/upgrade/response/public.go b/internal/http/upgrade/response/public.go
index e644abb..1ba02ee 100644
--- a/internal/http/upgrade/response/public.go
+++ b/internal/http/upgrade/response/public.go
@@ -61,7 +61,7 @@ func (r T) Send(w io.Writer) (int, error) {
 	headers = fmt.Sprintf("%s\r\n", headers)
 
 	/* (3) Build all */
-	raw := []byte(fmt.Sprintf("%s%s\r\n", responseLine, headers))
+	raw := []byte(fmt.Sprintf("%s%s", responseLine, headers))
 
 	/* (4) Write */
 	written, err := w.Write(raw)