diff --git a/var/Typecho/Request.php b/var/Typecho/Request.php
index 6c434f39..473110f4 100644
--- a/var/Typecho/Request.php
+++ b/var/Typecho/Request.php
@@ -377,7 +377,7 @@ class Request
      * @param string|null $default
      * @return string|null
      */
-    public function getServer(string $name, string $default = null): ?string
+    public function getServer(string $name, ?string $default = null): ?string
     {
         return $_SERVER[$name] ?? $default;
     }
diff --git a/var/Widget/Feed.php b/var/Widget/Feed.php
index 450927aa..7754f3c9 100644
--- a/var/Widget/Feed.php
+++ b/var/Widget/Feed.php
@@ -41,7 +41,7 @@ class Feed extends Contents
      */
     public function execute()
     {
-        $feedPath = $this->request->get('feed');
+        $feedPath = $this->request->get('feed', '/');
         $feedType = FeedGenerator::RSS2;
         $feedContentType = 'application/rss+xml';
         $currentFeedUrl = $this->options->feedUrl;