diff --git a/src/Extension/UrlExtension.php b/src/Extension/UrlExtension.php
index 08a3c6a..ce2ca0b 100644
--- a/src/Extension/UrlExtension.php
+++ b/src/Extension/UrlExtension.php
@@ -168,18 +168,19 @@ class UrlExtension implements Extension {
 
     protected function isHttps() : bool
     {
-        $header = in_array('https', array_map("strtolower", [
+        $https = in_array('https', array_map("strtolower", [
+            $_SERVER['REQUEST_SCHEME'] ?? "",
             $_SERVER['X-Url-Scheme'] ?? "",
             $_SERVER['Front-End-Https'] ?? "",
-            $_SERVER['X-Forwarded-Ssl'] ?? "",
             $_SERVER['X-Forwarded-Proto'] ?? "",
             $_SERVER['X-Forwarded-Protocol'] ?? "",
+            $_SERVER['HTTP_X_FORWARDED_PROTO'] ?? "",
+            $_SERVER['HTTP_X_FORWARDED_PROTOCOL'] ?? "",
         ])) || isset($_SERVER['HTTP_X_ARR_SSL']);
 
-        return $header
+        return $https
             || ( "443" === ( $_SERVER['SERVER_PORT'] ?? "" ) )
-            || ( "https" === ( $_SERVER['REQUEST_SCHEME'] ?? "http") )
-            || ( "off" !== ( strtolower($_SERVER['HTTPS'] ?? "off")) );
+            || ( "off" !== ( strtolower($_SERVER['HTTPS'] ?? $_SERVER['HTTP_X_FORWARDED_SSL'] ?? $_SERVER['X-Forwarded-Ssl'] ?? "off")) );
     }
 
     protected function prepareRoute(string $route, array &$arguments)