diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68d5922..5cb42ba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+# 0.2.8.rc
+
+/favicon/[domain] return 404 svg icon
+
 # 0.2.5.rc
 
 Fix https://github.com/seadfeng/favicon-downloader/issues/9
diff --git a/package.json b/package.json
index 1d0b976..1007d9a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "favicon-downloader",
-  "version": "0.2.7.rc",
+  "version": "0.2.8.rc",
   "private": true,
   "scripts": {
     "dev": "next dev",
diff --git a/src/app/api/favicon/[domain]/route.ts b/src/app/api/favicon/[domain]/route.ts
index 6911f30..14795e0 100644
--- a/src/app/api/favicon/[domain]/route.ts
+++ b/src/app/api/favicon/[domain]/route.ts
@@ -9,8 +9,8 @@ export async function GET(request: NextRequest, { params }: { params: { domain:
   const { domain } = params;
 
   // Validate domain name format
-  if (!/^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/.test(domain)) {
-    return new Response('Invalid domain name format', { status: 400 });
+  if (!/([a-z0-9-]+\.)+[a-z0-9]{1,}$/.test(domain)) {
+    return new Response(`Invalid domain name format${domain}`, { status: 400 });
   }
 
   // Define a helper function to handle the response
diff --git a/src/app/favicon/[domain]/route.ts b/src/app/favicon/[domain]/route.ts
index 3f37981..b874124 100644
--- a/src/app/favicon/[domain]/route.ts
+++ b/src/app/favicon/[domain]/route.ts
@@ -3,6 +3,7 @@ import { ResponseInfo } from '@/types';
 import type { NextRequest } from 'next/server';
 export const runtime = 'edge';
 
+
 export async function GET(request: NextRequest, { params: { domain } }: { params: { domain: string } }) {
   let icons: { sizes?: string; href: string }[] = [];
   const larger: boolean = request.nextUrl.searchParams.get('larger') === 'true'; // Get the 'larger' parameter
@@ -14,11 +15,29 @@ export async function GET(request: NextRequest, { params: { domain } }: { params
   // Convert the domain to ASCII encoding using URL API
   const asciiDomain = new URL(`http://${domain}`).hostname;
 
+  const svg404 = () => {
+    const firstLetter = domain.charAt(0).toUpperCase();
+    const svgContent = `
+        <svg width="100" height="100" xmlns="http://www.w3.org/2000/svg">
+          <rect width="100%" height="100%" fill="#cccccc"/>
+          <text x="50%" y="50%" font-size="48" text-anchor="middle" dominant-baseline="middle" fill="#000000">${firstLetter}</text>
+        </svg>
+      `;
+    return new Response(svgContent, {
+      status: 404,
+      headers: {
+        'Cache-Control': 'public, max-age=86400',
+        'Content-Type': 'image/svg+xml'
+      }
+    });
+  }
+
   // Validate domain name format
-  if (!/^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/.test(asciiDomain)) {
-    return new Response('Invalid domain name format', { status: 400 });
+  if (!/([a-z0-9-]+\.)+[a-z0-9]{1,}$/.test(asciiDomain)) {
+    return svg404();
   }
 
+
   if (larger) {
     const duckduckgoUrl = `https://icons.duckduckgo.com/ip3/${asciiDomain}.ico`;
     console.log("Ico source:", duckduckgoUrl);
@@ -99,23 +118,7 @@ export async function GET(request: NextRequest, { params: { domain } }: { params
     // Calculate execution time
     const endTime = Date.now();
     const executionTime = endTime - startTime;
-    if (!iconResponse.ok) {
-      const firstLetter = domain.charAt(0).toUpperCase();
-      const svgContent = `
-        <svg width="100" height="100" xmlns="http://www.w3.org/2000/svg">
-          <rect width="100%" height="100%" fill="#cccccc"/>
-          <text x="50%" y="50%" font-size="48" text-anchor="middle" dominant-baseline="middle" fill="#000000">${firstLetter}</text>
-        </svg>
-      `;
-      return new Response(svgContent, {
-        status: 404,
-        headers: {
-          'Cache-Control': 'public, max-age=86400',
-          'Content-Type': 'image/svg+xml',
-          'X-Execution-Time': `${executionTime}ms`
-        }
-      });
-    }
+    if (!iconResponse.ok) return svg404();
     const iconBuffer = await iconResponse.arrayBuffer();
 
     // Return the image response with execution time