diff --git a/docs-svelte-kit/src/lib/utils.js b/docs-svelte-kit/src/lib/utils.js
index 8eecc14e2..9c58a6db2 100644
--- a/docs-svelte-kit/src/lib/utils.js
+++ b/docs-svelte-kit/src/lib/utils.js
@@ -69,7 +69,8 @@ export function markdownPath(path) {
   // eslint-disable-next-line no-param-reassign -- ignore
   path = stripBaseUrl(path)
 
-  let normalized = path === "/" ? "README" : path.replace(/^\/|\/$/g, "")
+  let normalized =
+    !path.trim() || path === "/" ? "README" : path.replace(/^\/|\/$/g, "")
   return `${normalized}.md`
 }
 
@@ -95,10 +96,9 @@ export const menuItems = readable([], function start(set) {
 
 function generateMenu($page, toc) {
   const result = []
-  const [, menus] =
-    Object.entries(SIDE_MENU).find(([k]) =>
-      stripBaseUrl($page.url.pathname).startsWith(k),
-    ) || SIDE_MENU["/"]
+  const [, menus] = Object.entries(SIDE_MENU).find(([k]) =>
+    stripBaseUrl($page.url.pathname).startsWith(k),
+  ) || ["/", SIDE_MENU["/"]]
   for (const { path, title, children } of menus) {
     const active = isActive(path, $page)
     if (active) {
diff --git a/package.json b/package.json
index 46c6c08b7..d79d8689f 100644
--- a/package.json
+++ b/package.json
@@ -76,8 +76,8 @@
     "@ota-meshi/eslint-plugin": "^0.10.0",
     "@ota-meshi/eslint-plugin-svelte": "^0.26.0",
     "@sindresorhus/slugify": "^2.1.0",
-    "@sveltejs/adapter-static": "^1.0.0-next.21",
-    "@sveltejs/kit": "^1.0.0-next.201",
+    "@sveltejs/adapter-static": "^1.0.0-next.26",
+    "@sveltejs/kit": "^1.0.0-next.240",
     "@types/eslint": "^8.0.0",
     "@types/eslint-scope": "^3.7.0",
     "@types/eslint-visitor-keys": "^1.0.0",
diff --git a/svelte.config.esm.mjs b/svelte.config.esm.mjs
index 577dae5f7..4cf11f65e 100644
--- a/svelte.config.esm.mjs
+++ b/svelte.config.esm.mjs
@@ -40,7 +40,7 @@ const config = {
       assets: path.join(dirname, "./docs-svelte-kit/statics"),
     },
 
-    trailingSlash: "always",
+    // trailingSlash: "always",
 
     vite: {
       server: {