diff --git a/upload/install/index.php b/upload/install/index.php
index dbceedb0b0f..1a98f7ae773 100644
--- a/upload/install/index.php
+++ b/upload/install/index.php
@@ -3,8 +3,9 @@
error_reporting(E_ALL);
// HTTP
-define('HTTP_SERVER', 'http://' . $_SERVER['HTTP_HOST'] . rtrim(dirname($_SERVER['SCRIPT_NAME']), '/.\\') . '/');
-define('HTTP_OPENCART', 'http://' . $_SERVER['HTTP_HOST'] . rtrim(rtrim(dirname($_SERVER['SCRIPT_NAME']), 'install'), '/.\\') . '/');
+$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
+define('HTTP_SERVER', $protocol . $_SERVER['HTTP_HOST'] . rtrim(dirname($_SERVER['SCRIPT_NAME']), '/.\\') . '/');
+define('HTTP_OPENCART', $protocol . $_SERVER['HTTP_HOST'] . rtrim(rtrim(dirname($_SERVER['SCRIPT_NAME']), 'install'), '/.\\') . '/');
// DIR
define('DIR_APPLICATION', str_replace('\\', '/', realpath(dirname(__FILE__))) . '/');
diff --git a/upload/install/view/template/header.tpl b/upload/install/view/template/header.tpl
index 7f3ac01ba6e..a914b4f2e81 100644
--- a/upload/install/view/template/header.tpl
+++ b/upload/install/view/template/header.tpl
@@ -8,7 +8,7 @@
-
+
\ No newline at end of file