diff --git a/Trojan-TCP-XTLS/nginx.conf b/Trojan-TCP-XTLS/nginx.conf
index 26e92a4..3231746 100644
--- a/Trojan-TCP-XTLS/nginx.conf
+++ b/Trojan-TCP-XTLS/nginx.conf
@@ -50,7 +50,7 @@ http {
         include /etc/nginx/default.d/*.conf;
 
         # 开启HSTS，混sslab的A+
-	      add_header Strict-Transport-Security "max-age=63072000" always;
+	add_header Strict-Transport-Security "max-age=63072000" always;
 
         error_page 404 /404.html;
             location = /40x.html {