diff --git a/.node-version b/.node-version
index cabf43b..8fdd954 100755
--- a/.node-version
+++ b/.node-version
@@ -1 +1 @@
-24
\ No newline at end of file
+22
\ No newline at end of file
diff --git a/README.md b/README.md
index 50971d8..631e7b3 100644
--- a/README.md
+++ b/README.md
@@ -145,7 +145,7 @@ Nooxy provides sophisticated URL rewriting that handles:
 
 ### Prerequisites
 
-- Node.js
+- Node.js 18.17.0 or higher
 - A Cloudflare account (for deployment)
 - A custom domain (optional, for production)
 
@@ -230,7 +230,7 @@ export const SITE_CONFIG = {
   // Optional: 404 page configuration
   // fof: {
   //   page: "NOTION_PAGE_ID",
-  //   slug: "404", // default
+  //   slug: "/404", // default
   // },
 
   // Optional: Subdomain redirects
@@ -660,7 +660,7 @@ Please see [CONTRIBUTING.md](CONTRIBUTING.md) for full guidelines, development s
 
 **Solution**:
 
-- Ensure you're using Node.js 22.0.0 or higher
+- Ensure you're using Node.js 18.17.0 or higher
 - Check that your `wrangler.toml` is configured correctly
 - Verify your Notion pages are accessible
 
diff --git a/examples/cloudflare/nooxy/config.js b/examples/cloudflare/nooxy/config.js
index 8544642..4fdf149 100644
--- a/examples/cloudflare/nooxy/config.js
+++ b/examples/cloudflare/nooxy/config.js
@@ -42,7 +42,7 @@ export const SITE_CONFIG = {
   // If you don't have one, the default 404 page will be used
   // fof: {
   //   page: "NOTION_PAGE_ID",
-  //   slug: "404", // default
+  //   slug: "/404", // default
   // },
   // Subdomain redirects are optional
   // But it is recommended to have one for www
diff --git a/package.json b/package.json
index 5a632c7..e2fd15d 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "email": "david@draphy.org"
   },
   "engines": {
-    "node": ">=22.0.0"
+    "node": ">=18.17.0"
   },
   "license": "MIT",
   "publishConfig": {
@@ -63,7 +63,7 @@
     }
   },
   "scripts": {
-    "prebuild": "node converter.js && pnpm biome:fix ",
+    "prebuild": "node converter.js && pnpm biome:fix",
     "build": "pnpm run prebuild && tsup src/index.ts --format esm --dts-resolve --clean --sourcemap --out-dir dist && pnpm run build:cli",
     "build:cli": "tsup src/cli/index.ts --format esm --clean --out-dir dist/cli && cp -r src/cli/templates dist/cli/",
     "biome:lint": "biome lint .",
diff --git a/src/cli/templates/config.js b/src/cli/templates/config.js
index 8544642..4fdf149 100644
--- a/src/cli/templates/config.js
+++ b/src/cli/templates/config.js
@@ -42,7 +42,7 @@ export const SITE_CONFIG = {
   // If you don't have one, the default 404 page will be used
   // fof: {
   //   page: "NOTION_PAGE_ID",
-  //   slug: "404", // default
+  //   slug: "/404", // default
   // },
   // Subdomain redirects are optional
   // But it is recommended to have one for www
diff --git a/src/handlers/handle-sitemap.ts b/src/handlers/handle-sitemap.ts
index 994071f..f18c708 100644
--- a/src/handlers/handle-sitemap.ts
+++ b/src/handlers/handle-sitemap.ts
@@ -5,7 +5,7 @@ export function handleSitemap(siteConfig: NooxySiteConfigFull, protocol: string)
   let sitemap = '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">';
 
   slugs.forEach((slug) => {
-    sitemap += `<url><loc>${protocol}//${domain}/${slug}</loc></url>`;
+    sitemap += `<url><loc>${protocol}//${domain}${slug}</loc></url>`;
   });
   sitemap += '</urlset>';
 
diff --git a/src/helpers/config-loader.ts b/src/helpers/config-loader.ts
index ed2fe9a..cfd98c1 100644
--- a/src/helpers/config-loader.ts
+++ b/src/helpers/config-loader.ts
@@ -40,11 +40,11 @@ export class ConfigManager {
 
     siteConfig.fof = {
       page: siteConfig.fof?.page,
-      slug: siteConfig.fof?.slug || '404',
+      slug: siteConfig.fof?.slug || '/404',
     };
 
     if (siteConfig.fof.page?.length) {
-      siteConfig.slugToPage[siteConfig.fof.slug ?? ''] = siteConfig.fof.page;
+      siteConfig.slugToPage[siteConfig.fof.slug ?? '/404'] = siteConfig.fof.page;
     }
 
     // Build helper indexes
diff --git a/src/helpers/index.ts b/src/helpers/index.ts
index c14ef54..07d8b8d 100644
--- a/src/helpers/index.ts
+++ b/src/helpers/index.ts
@@ -88,16 +88,15 @@ export function isNotion404(pathname: string, slugToPage: Record<string, string>
   ) {
     return false;
   }
-  const lastSlashIndex = pathname.lastIndexOf('/');
-  const slugSlash = lastSlashIndex === -1 ? pathname : pathname.slice(lastSlashIndex + 1);
-  const lastHyphenIndex = slugSlash.lastIndexOf('-');
-  const slug = lastHyphenIndex === -1 ? slugSlash : slugSlash.slice(lastHyphenIndex + 1);
-  if (!slug) {
+  const lastSlash = pathname.slice(pathname.lastIndexOf('/') + 1);
+  const pageId = lastSlash.slice(lastSlash.lastIndexOf('-') + 1);
+  const slug = extractSlug(pathname);
+  if (!pageId && !slug) {
     return false;
   }
-  const page = slugToPage[`/${slug}`];
-  const notValidSlug = slug.length !== 32;
-  if (!page && notValidSlug) {
+  const page = slugToPage[slug ?? ''];
+  const validPageId = pageId.length === 32;
+  if (!page && !validPageId) {
     return true;
   }
   return false;
diff --git a/src/types.ts b/src/types.ts
index 981cdf2..c6a8a04 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -20,7 +20,7 @@ export interface NooxySiteConfigFull {
   // Use the value from your Notion like example.notion.site
   notionDomain: string
 
-  // 404 Notion page to display to visitors, the default slug is '404'
+  // 404 Notion page to display to visitors, the default slug is '/404'
   fof?: {
     page: string | undefined
     slug: string | undefined
diff --git a/tsconfig.json b/tsconfig.json
index aca5164..96b3f0d 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,8 @@
   "_version": "22.0.0",
   "compilerOptions": {
     "lib": [
-      "es2023"
+      "ES2021",
+      "DOM"  
     ],
     "strict": true,
     "moduleResolution": "bundler",
@@ -16,7 +17,7 @@
     // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
     /* Language and Environment */
-    "target": "ESNext", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "ES2021", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
@@ -29,7 +30,7 @@
     // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
     // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
     /* Modules */
-    "module": "ESNext", /* Specify what module code is generated. */
+    "module": "ES2022", /* Specify what module code is generated. */
     // "rootDir": "./",                                  /* Specify the root folder within your source files. */
     // "moduleResolution": "node10",                     /* Specify how TypeScript looks up a file from a given module specifier. */
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */