diff --git a/inc/functions/net.php b/inc/functions/net.php
index ab08c3cb..ebf578e7 100644
--- a/inc/functions/net.php
+++ b/inc/functions/net.php
@@ -6,5 +6,13 @@ namespace Vichan\Functions\Net;
  * @return bool Returns if the client-server connection is an encrypted one (HTTPS).
  */
 function is_connection_secure(): bool {
-	return !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off';
+    if (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') {
+        return true;
+    }
+    elseif (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
+        return true;
+    }
+    else {
+	return false;
+    }
 }